if apples are four for 28 cents, how much would dozen cost?

Answer 1

You might find this easiest if you set up a proportion. The general rate is 4 apples/28 cents. You are being asked for the specific rate of 12 apples/x cents. You can therefore create a proportion by setting the rates equal to each other:

4 apples/28 cents = 12 apples/x cents

4/28 = 12/x [dropping the units]

4x = 28*12 [cross-multiplying]

x = 28*12/4 [dividing both sides of the equation by 4]

x = 84 [performing the multiplication and division]

Answer 2

Well a dozen is 12, and 4 is 1/3 of 12. The answer is simply multiplying 3 by however much the four cost, which was 28 cents. So, 28 x 3= 84 cents.