Question 965190
720/4500 = x/5800


cross multiply to get 720 * 5800 = 4500 * x


solve for x to get x = (720 * 5800) / 4500 = 928


assuming the interest rate is the same, then the interest on 5800 should be 928.


let's see if that's true.


interest rate on 720/4500 is equal to .16


.16 * 5800 is equal to 928.


it works.


this is a direct variation type equation.


y = k*x


when y is 720 and x is 4500, then:


720 = k * 4500.


solve for k to get k = 720 / 4500 = .16


now apply k to your new value for x.


y = k * x becomes y = .16 * 5800 which becomes y = 928.