Answer: ad = bc
Step-by-step explanation: A proportion is an equation which states that two ratios are equal. For example, [tex]\frac{a}{b} = \frac{c}{d}[/tex] is an example of a proportion.
In the given proportion, a and d are called extremes and b and c are called means.
The first property that I will be talking about states that the product of the extremes equals the product of the means.
This idea is called the means-extremes property.
So if [tex]\frac{a}{b} = \frac{c}{d}[/tex], we know that a times d equals b times c by the means-extremes property or ad = bc.
So the solution to the proportion [tex]\frac{a}{b} = \frac{c}{d}[/tex] is ad = bc.
