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N14 X fx A B D E F G H 1 J 1 2 3 (4.3c) Example 7 Calculating Interest Rates Solve for the unknown interest rate in each of the following: 4 Calculations: FV = 5 6 Years r 2 r 7 8 Present Value $242 410 51,700 18,750 PVx(1 + r) (FV/PV1/t - 1 12.63% 9.07% 7.92% 11.44% Interest Rates ture Value % $307 896 % 162,181 % 483,500 9 15 30 r r 9 10 11 12 13 14 15 Question #1(b): Calculating No. of Periods Solve for the unknown number of years in each of the following: Calculations: FV 16 17 Years t t Present Value $625 810 18,400 21,500 18 19 20 21 22 23 24 Interest Rates ture Value 6.0% $1,284 13.0% 4,341 32.0% 402,662 16.0% 173,439 PVx(1 + r) In(FV/PVVin(1+1) 12.36 13.74 11.11 14.07 t t t