can u give me a paragraph describing what makes a proportion? give an example of a proportion

A proportion is a statement that two ratios are equal. In other words, it is an equation that states that two fractions are equivalent. Proportions show the relationship between two sets of numbers by comparing their sizes or quantities. For example, if we have two ratios 2:4 and 5:10, we can see that they are in proportion because both ratios reduce to 1:2. This means that for every 2 items in the first set, there are 4 items in the second set, and for every 5 items in the first set, there are 10 items in the second set. This demonstrates that the two sets are in proportion to each other.