The following three proportions can all be used to solve the problem about Caroline's salary. Explain why the solutions to each proportion are the same. 36 4 = x 7 4 36 = 7 x 36 x = 4 7
Each proportion is written so the units are in the corresponding positions. The cross products of all the proportions result in the equation 4x = 252, which results in x = 63.
