Question

Suppose that 18 inches of wire costs 54 cents. At the same rate, how much (in cents) will 48 inches of wire cost? ce cents X​

Answer 1

ok so we make a proportion. (18/54)=(48/x). the inches are in the same position (on top) and the cost is on the same position (on bottom). therefore we can cross multiply and see that (18*x)=(54*48), and we get (18x)=(2592), and finally divide both sides by 18 to get (x)=(144). to conceptualize this, we can see that x (cents) is 144, so that is $1.44.