IN MATH: 1. v. in a proportion, to rewrite the equation so that the product of the means equals the product of the extremes. EX. Cross multiply to solve: 3/4 = x/17.

IN ENGLISH: 1. as defined above.

Remind me. Why Is It Legal to Cross Multiply? It is legal to multiply any number by 1 without changing its value. In solving an equation you must do the same thing to each side of the equation. If you "flip" the proportion, exchanging numerators with denominators, the proportion is still true. This is the same as taking the reciprocal of each side of the equation.

APPLICATION: See list 350.

1. Cross multiply to solve: x/5=5/8.

IN MATH: 1. n. in solving a proportion by cross multiplication, either of the two products produced by the cross multiplication: either member or side of the equation resulting from cross multiplication, either the product of the means or the product of the extremes.

APPLICATION: 1. as defined above.

APPLICATION: See list 350.

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