
Natalie K. answered 09/27/19
Patient PhD Specializing in Math and Science
According to investopedia, "An ordinary annuity is a series of equal payments made at the end of consecutive periods over a fixed length of time."
Three variables are present when calculating the present or future value of the ordinary annuity:
r, the interest rate per period
PMT, the period of the cash payment
n, the total number of periods
The equation to calculate the future value of an ordinary annuity is given as follows:
Future Value Of an Ordinary Annuity = PMT * ( ( ( 1 + r )n - 1 ) / r )
In this problem, PMT = $1200/quarterly, r = 4% or 0.04/year compounded quarterly , and n = 5 years. We need to convert n to quarters:
n = 5 years * 4 quarters / 1 year = 20 quarters
Plugging in:
Future Value = 1200 * ( ( 1 + 0.04)20 - 1) / 0.04) = 1200 * ( (2.19112314303 - 1) / 0.04) = 1200 * 29.77807857575 = $35,733.69