Question

Use cross products to determine which of the following proportions are equivalent to each other. Select all situations that apply.

Answer 1

9514 1404 393

Answer:

`(a)/(c)=(b)/(d)\ \Leftrightarrow\ (a)/(b)=(c)/(d)`

Explanation:

The cross products related to the proportions shown here are ...

`(a)/(d)=(c)/(b)\ \Rightarrow\ ab=cd\\\\(a)/(c)=(b)/(d)\ \Rightarrow\ ad=bc\qquad\text{same as the fourth one}\\\\(d)/(a)=(c)/(b)\ \Rightarrow\ bd=ac\\\\(a)/(b)=(c)/(d)\ \Rightarrow\ ad=bc\qquad\text{same as the second one}`