Final Payment Value Compound Interest Question











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A demand loan of $$4000.00$ is repaid by payments of $$2000.00$ after two years, $$2000.00$ after four years, and a final payment after six years.



Interest is $6%$ compounded quarterly for the first two years, $7%$ compounded annually for the next two years, and 7% compounded semi-annually thereafter. What is the size of the final payment?



I know how to make all these precursor calculations but I'm very lost on which formula to use to find the final amount.




  1. payment. $3000(1+0.0175)^{0.5}$


  2. Payment $3000(1+0.04)^{2}$











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  • 1




    Far better to use understanding than to use a formula.
    – Gerry Myerson
    Nov 19 at 5:08










  • I get that but I'm struggling with the concept and I think knowing the formula would allow me the context to mentally frame it better.
    – John Deer
    Nov 19 at 5:13










  • I think understanding the mathematics would be a better idea, but each to his/her own.
    – Gerry Myerson
    Nov 19 at 5:19










  • If you would like to try and give me a better understanding I would very much like to hear it.
    – John Deer
    Nov 19 at 5:24






  • 1




    OK. What's the balance after two years, before the first repayment? What's the balance after two years, after the first reapyment? Same question for after 4 years, before and after the second repayment. Then, what's the balance at the end of six years?
    – Gerry Myerson
    Nov 19 at 5:27















up vote
1
down vote

favorite












A demand loan of $$4000.00$ is repaid by payments of $$2000.00$ after two years, $$2000.00$ after four years, and a final payment after six years.



Interest is $6%$ compounded quarterly for the first two years, $7%$ compounded annually for the next two years, and 7% compounded semi-annually thereafter. What is the size of the final payment?



I know how to make all these precursor calculations but I'm very lost on which formula to use to find the final amount.




  1. payment. $3000(1+0.0175)^{0.5}$


  2. Payment $3000(1+0.04)^{2}$











share|cite|improve this question




















  • 1




    Far better to use understanding than to use a formula.
    – Gerry Myerson
    Nov 19 at 5:08










  • I get that but I'm struggling with the concept and I think knowing the formula would allow me the context to mentally frame it better.
    – John Deer
    Nov 19 at 5:13










  • I think understanding the mathematics would be a better idea, but each to his/her own.
    – Gerry Myerson
    Nov 19 at 5:19










  • If you would like to try and give me a better understanding I would very much like to hear it.
    – John Deer
    Nov 19 at 5:24






  • 1




    OK. What's the balance after two years, before the first repayment? What's the balance after two years, after the first reapyment? Same question for after 4 years, before and after the second repayment. Then, what's the balance at the end of six years?
    – Gerry Myerson
    Nov 19 at 5:27













up vote
1
down vote

favorite









up vote
1
down vote

favorite











A demand loan of $$4000.00$ is repaid by payments of $$2000.00$ after two years, $$2000.00$ after four years, and a final payment after six years.



Interest is $6%$ compounded quarterly for the first two years, $7%$ compounded annually for the next two years, and 7% compounded semi-annually thereafter. What is the size of the final payment?



I know how to make all these precursor calculations but I'm very lost on which formula to use to find the final amount.




  1. payment. $3000(1+0.0175)^{0.5}$


  2. Payment $3000(1+0.04)^{2}$











share|cite|improve this question















A demand loan of $$4000.00$ is repaid by payments of $$2000.00$ after two years, $$2000.00$ after four years, and a final payment after six years.



Interest is $6%$ compounded quarterly for the first two years, $7%$ compounded annually for the next two years, and 7% compounded semi-annually thereafter. What is the size of the final payment?



I know how to make all these precursor calculations but I'm very lost on which formula to use to find the final amount.




  1. payment. $3000(1+0.0175)^{0.5}$


  2. Payment $3000(1+0.04)^{2}$








algebra-precalculus finance






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edited Nov 19 at 5:30









NoChance

3,59621221




3,59621221










asked Nov 19 at 5:03









John Deer

111




111








  • 1




    Far better to use understanding than to use a formula.
    – Gerry Myerson
    Nov 19 at 5:08










  • I get that but I'm struggling with the concept and I think knowing the formula would allow me the context to mentally frame it better.
    – John Deer
    Nov 19 at 5:13










  • I think understanding the mathematics would be a better idea, but each to his/her own.
    – Gerry Myerson
    Nov 19 at 5:19










  • If you would like to try and give me a better understanding I would very much like to hear it.
    – John Deer
    Nov 19 at 5:24






  • 1




    OK. What's the balance after two years, before the first repayment? What's the balance after two years, after the first reapyment? Same question for after 4 years, before and after the second repayment. Then, what's the balance at the end of six years?
    – Gerry Myerson
    Nov 19 at 5:27














  • 1




    Far better to use understanding than to use a formula.
    – Gerry Myerson
    Nov 19 at 5:08










  • I get that but I'm struggling with the concept and I think knowing the formula would allow me the context to mentally frame it better.
    – John Deer
    Nov 19 at 5:13










  • I think understanding the mathematics would be a better idea, but each to his/her own.
    – Gerry Myerson
    Nov 19 at 5:19










  • If you would like to try and give me a better understanding I would very much like to hear it.
    – John Deer
    Nov 19 at 5:24






  • 1




    OK. What's the balance after two years, before the first repayment? What's the balance after two years, after the first reapyment? Same question for after 4 years, before and after the second repayment. Then, what's the balance at the end of six years?
    – Gerry Myerson
    Nov 19 at 5:27








1




1




Far better to use understanding than to use a formula.
– Gerry Myerson
Nov 19 at 5:08




Far better to use understanding than to use a formula.
– Gerry Myerson
Nov 19 at 5:08












I get that but I'm struggling with the concept and I think knowing the formula would allow me the context to mentally frame it better.
– John Deer
Nov 19 at 5:13




I get that but I'm struggling with the concept and I think knowing the formula would allow me the context to mentally frame it better.
– John Deer
Nov 19 at 5:13












I think understanding the mathematics would be a better idea, but each to his/her own.
– Gerry Myerson
Nov 19 at 5:19




I think understanding the mathematics would be a better idea, but each to his/her own.
– Gerry Myerson
Nov 19 at 5:19












If you would like to try and give me a better understanding I would very much like to hear it.
– John Deer
Nov 19 at 5:24




If you would like to try and give me a better understanding I would very much like to hear it.
– John Deer
Nov 19 at 5:24




1




1




OK. What's the balance after two years, before the first repayment? What's the balance after two years, after the first reapyment? Same question for after 4 years, before and after the second repayment. Then, what's the balance at the end of six years?
– Gerry Myerson
Nov 19 at 5:27




OK. What's the balance after two years, before the first repayment? What's the balance after two years, after the first reapyment? Same question for after 4 years, before and after the second repayment. Then, what's the balance at the end of six years?
– Gerry Myerson
Nov 19 at 5:27










2 Answers
2






active

oldest

votes

















up vote
1
down vote













The final payment can be calculated in steps by figuring how much the loan has grown with interest over each time period before each of the stage payments. I'm assuming the interest for each time period is simply the annual rate divided by the number of time periods per year.



$$P_F = ((4000cdot 1.015^8 -2000)1.07^2 - 2000)1.035^4 = $997.30$$






share|cite|improve this answer





















  • I'm confused where you're getting your N value as I thought it was numbers of years divided by interests compounds per year so for the first 2 years wouldn't it be 4000(1.015)^0.5 as it Would be 2 years divided by 4 (quarterly interest compounds)
    – John Deer
    Nov 19 at 5:57










  • No, it's 1.015 to the power of the number of quarters in 2 years which is 8.Then 1.07 to the power of the number of years which is 2 and finally 1.035 to the power of the number of half years in 2 years which is 4.
    – Phil H
    Nov 19 at 7:18


















up vote
0
down vote













$L=4000$, $p_2=2000$, $p_4=2000$, $i^{(4)} =6%$, $i^{(1)} =7%$, $i^{(2)} =7%$. Find $p_6$ solving



$$
L=frac{p_2}{left(1+frac{i^{(4)}}{4}right)^{2times 4}} +frac{p_4}{left(1+frac{i^{(4)}}{4}right)^{2times 4}timesleft(1+frac{i^{(1)}}{1}right)^{2times 1}}+frac{p_6}{left(1+frac{i^{(4)}}{4}right)^{2times 4}timesleft(1+frac{i^{(1)}}{1}right)^{2times 1}timesleft(1+frac{i^{(2)}}{2}right)^{2times 2}}
$$






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    2 Answers
    2






    active

    oldest

    votes








    2 Answers
    2






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes








    up vote
    1
    down vote













    The final payment can be calculated in steps by figuring how much the loan has grown with interest over each time period before each of the stage payments. I'm assuming the interest for each time period is simply the annual rate divided by the number of time periods per year.



    $$P_F = ((4000cdot 1.015^8 -2000)1.07^2 - 2000)1.035^4 = $997.30$$






    share|cite|improve this answer





















    • I'm confused where you're getting your N value as I thought it was numbers of years divided by interests compounds per year so for the first 2 years wouldn't it be 4000(1.015)^0.5 as it Would be 2 years divided by 4 (quarterly interest compounds)
      – John Deer
      Nov 19 at 5:57










    • No, it's 1.015 to the power of the number of quarters in 2 years which is 8.Then 1.07 to the power of the number of years which is 2 and finally 1.035 to the power of the number of half years in 2 years which is 4.
      – Phil H
      Nov 19 at 7:18















    up vote
    1
    down vote













    The final payment can be calculated in steps by figuring how much the loan has grown with interest over each time period before each of the stage payments. I'm assuming the interest for each time period is simply the annual rate divided by the number of time periods per year.



    $$P_F = ((4000cdot 1.015^8 -2000)1.07^2 - 2000)1.035^4 = $997.30$$






    share|cite|improve this answer





















    • I'm confused where you're getting your N value as I thought it was numbers of years divided by interests compounds per year so for the first 2 years wouldn't it be 4000(1.015)^0.5 as it Would be 2 years divided by 4 (quarterly interest compounds)
      – John Deer
      Nov 19 at 5:57










    • No, it's 1.015 to the power of the number of quarters in 2 years which is 8.Then 1.07 to the power of the number of years which is 2 and finally 1.035 to the power of the number of half years in 2 years which is 4.
      – Phil H
      Nov 19 at 7:18













    up vote
    1
    down vote










    up vote
    1
    down vote









    The final payment can be calculated in steps by figuring how much the loan has grown with interest over each time period before each of the stage payments. I'm assuming the interest for each time period is simply the annual rate divided by the number of time periods per year.



    $$P_F = ((4000cdot 1.015^8 -2000)1.07^2 - 2000)1.035^4 = $997.30$$






    share|cite|improve this answer












    The final payment can be calculated in steps by figuring how much the loan has grown with interest over each time period before each of the stage payments. I'm assuming the interest for each time period is simply the annual rate divided by the number of time periods per year.



    $$P_F = ((4000cdot 1.015^8 -2000)1.07^2 - 2000)1.035^4 = $997.30$$







    share|cite|improve this answer












    share|cite|improve this answer



    share|cite|improve this answer










    answered Nov 19 at 5:50









    Phil H

    3,9302312




    3,9302312












    • I'm confused where you're getting your N value as I thought it was numbers of years divided by interests compounds per year so for the first 2 years wouldn't it be 4000(1.015)^0.5 as it Would be 2 years divided by 4 (quarterly interest compounds)
      – John Deer
      Nov 19 at 5:57










    • No, it's 1.015 to the power of the number of quarters in 2 years which is 8.Then 1.07 to the power of the number of years which is 2 and finally 1.035 to the power of the number of half years in 2 years which is 4.
      – Phil H
      Nov 19 at 7:18


















    • I'm confused where you're getting your N value as I thought it was numbers of years divided by interests compounds per year so for the first 2 years wouldn't it be 4000(1.015)^0.5 as it Would be 2 years divided by 4 (quarterly interest compounds)
      – John Deer
      Nov 19 at 5:57










    • No, it's 1.015 to the power of the number of quarters in 2 years which is 8.Then 1.07 to the power of the number of years which is 2 and finally 1.035 to the power of the number of half years in 2 years which is 4.
      – Phil H
      Nov 19 at 7:18
















    I'm confused where you're getting your N value as I thought it was numbers of years divided by interests compounds per year so for the first 2 years wouldn't it be 4000(1.015)^0.5 as it Would be 2 years divided by 4 (quarterly interest compounds)
    – John Deer
    Nov 19 at 5:57




    I'm confused where you're getting your N value as I thought it was numbers of years divided by interests compounds per year so for the first 2 years wouldn't it be 4000(1.015)^0.5 as it Would be 2 years divided by 4 (quarterly interest compounds)
    – John Deer
    Nov 19 at 5:57












    No, it's 1.015 to the power of the number of quarters in 2 years which is 8.Then 1.07 to the power of the number of years which is 2 and finally 1.035 to the power of the number of half years in 2 years which is 4.
    – Phil H
    Nov 19 at 7:18




    No, it's 1.015 to the power of the number of quarters in 2 years which is 8.Then 1.07 to the power of the number of years which is 2 and finally 1.035 to the power of the number of half years in 2 years which is 4.
    – Phil H
    Nov 19 at 7:18










    up vote
    0
    down vote













    $L=4000$, $p_2=2000$, $p_4=2000$, $i^{(4)} =6%$, $i^{(1)} =7%$, $i^{(2)} =7%$. Find $p_6$ solving



    $$
    L=frac{p_2}{left(1+frac{i^{(4)}}{4}right)^{2times 4}} +frac{p_4}{left(1+frac{i^{(4)}}{4}right)^{2times 4}timesleft(1+frac{i^{(1)}}{1}right)^{2times 1}}+frac{p_6}{left(1+frac{i^{(4)}}{4}right)^{2times 4}timesleft(1+frac{i^{(1)}}{1}right)^{2times 1}timesleft(1+frac{i^{(2)}}{2}right)^{2times 2}}
    $$






    share|cite|improve this answer

























      up vote
      0
      down vote













      $L=4000$, $p_2=2000$, $p_4=2000$, $i^{(4)} =6%$, $i^{(1)} =7%$, $i^{(2)} =7%$. Find $p_6$ solving



      $$
      L=frac{p_2}{left(1+frac{i^{(4)}}{4}right)^{2times 4}} +frac{p_4}{left(1+frac{i^{(4)}}{4}right)^{2times 4}timesleft(1+frac{i^{(1)}}{1}right)^{2times 1}}+frac{p_6}{left(1+frac{i^{(4)}}{4}right)^{2times 4}timesleft(1+frac{i^{(1)}}{1}right)^{2times 1}timesleft(1+frac{i^{(2)}}{2}right)^{2times 2}}
      $$






      share|cite|improve this answer























        up vote
        0
        down vote










        up vote
        0
        down vote









        $L=4000$, $p_2=2000$, $p_4=2000$, $i^{(4)} =6%$, $i^{(1)} =7%$, $i^{(2)} =7%$. Find $p_6$ solving



        $$
        L=frac{p_2}{left(1+frac{i^{(4)}}{4}right)^{2times 4}} +frac{p_4}{left(1+frac{i^{(4)}}{4}right)^{2times 4}timesleft(1+frac{i^{(1)}}{1}right)^{2times 1}}+frac{p_6}{left(1+frac{i^{(4)}}{4}right)^{2times 4}timesleft(1+frac{i^{(1)}}{1}right)^{2times 1}timesleft(1+frac{i^{(2)}}{2}right)^{2times 2}}
        $$






        share|cite|improve this answer












        $L=4000$, $p_2=2000$, $p_4=2000$, $i^{(4)} =6%$, $i^{(1)} =7%$, $i^{(2)} =7%$. Find $p_6$ solving



        $$
        L=frac{p_2}{left(1+frac{i^{(4)}}{4}right)^{2times 4}} +frac{p_4}{left(1+frac{i^{(4)}}{4}right)^{2times 4}timesleft(1+frac{i^{(1)}}{1}right)^{2times 1}}+frac{p_6}{left(1+frac{i^{(4)}}{4}right)^{2times 4}timesleft(1+frac{i^{(1)}}{1}right)^{2times 1}timesleft(1+frac{i^{(2)}}{2}right)^{2times 2}}
        $$







        share|cite|improve this answer












        share|cite|improve this answer



        share|cite|improve this answer










        answered Dec 2 at 0:51









        alexjo

        12.2k1329




        12.2k1329






























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