Need help!

At what interest rate, to the nearest hundredth of a percent, will $16,000 grow to $20,000 if invested for 5.25 years and interest rate compounded quarterly?

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- Apr 20th 2013, 10:40 PMhighlife2323Interest Rate
Need help!

At what interest rate, to the nearest hundredth of a percent, will $16,000 grow to $20,000 if invested for 5.25 years and interest rate compounded quarterly? - Apr 21st 2013, 12:06 AMBradynsRe: Interest Rate
IIRC

Where,

C is the compounded amount

P is the principle (starting) amount

p is the rate (what you're after)

n is time.

Given that it is done quarterly for 5.25 years,

Let's do some algebra with our n value as 21.

Original Equation

Multiply out by P

Take the 21st root of both sides.

multiply both sides by 21, then subtract 21

Plug in the values

That should find you your rate.

x = 21((1.25)^(1/21)) -21 - Wolfram|Alpha

p = 22.43% - Apr 21st 2013, 08:28 PMBradynsRe: Interest Rate
Sorry, I got the equation wrong.

This is the correct one:

C is the compounded amount

P is the principle (starting) amount

p is the rate (what you're after)

n is times compounded annually.

t is the number of years.

Doing the same sort of stuff..

p = 0.0427302 or 4.3%

x = 4((1.25)^(1/21)) -4 - Wolfram|Alpha