Vocabulary
Cross Product Property - The product of the extremes equals the product of the means.
Means - the "b" and "c" in the proportion a/b = c/d
Proportion - an equation that equates two ratios
Reciprocal Property - If two ratios are equal, then their reciprocals are also equal.
Extremes - the "a" and "d" in the proportion a/b = c/d
Ratio - A comparison of two numbers in the same unit
