Answer:
For the final payment be indifferent to the first payment form, the amount of money we need to pay is $22,531.9.
Explanation:
Notice that to the loan be indifferent, the money we wont pay for each of the years in the first form id money we need to borrow, then the bank is offering loans over eachone five yaers at a 4% interest rate. That mean we are borrowing the following loans:
The first year, a loan to pay in five years: L1 = $4,000*(1+0.04)^5
The second year, a loan to pay in 4 years: L2 = $4,000*(1+0.04)^4
The third year, a loan to pay in 3 years: L3 = $4,000*(1+0.04)^3
The fourth year, a loan to pay in 2 years: L4 = $4,000*(1+0.04)^2
The fiveth year, a loan to pay in 1 year: L5 = $4,000*(1+0.04)^1
By calculating each loan we have:
L1 = $4,000*(1+0.04)^5 = $4,866.6
L2 = $4,000*(1+0.04)^4 = $4,679.4
L3 = $4,000*(1+0.04)^3 = $4,499.5
L4 = $4,000*(1+0.04)^2 = $4,326.4
L5 = $4,000*(1+0.04)^1 = $4,816.0
If we add each one of those loans we obtain the equivalent final payment:
L = L1 + L2 + L3 + L4 + L5
L = $4,866.6 + $4,679.4 + $4,499.5 + $4,326.4 + $4,816.0 = $22,531.9