Final answer:
An equation that states two ratios are equal is a proportion.
Step-by-step explanation:
An equation that states two ratios are equal is a proportion. In a proportion, the four numbers are related in such a way that the product of the means equals the product of the extremes. For example, in the proportion a/b = c/d, the product of a and d should be equal to the product of b and c.
Learn more about Proportions in mathematics