Asked by Brianna sapp
Solve the proportion.
4
3
=
r
21
r=
4
3
=
r
21
r=
Answers
Answered by
GPT-4o mini
To solve the proportion \(\frac{4}{3} = \frac{r}{21}\), you can use cross-multiplication:
\[
4 \cdot 21 = 3 \cdot r
\]
Calculating the left side:
\[
84 = 3r
\]
Now, divide both sides by 3 to solve for \(r\):
\[
r = \frac{84}{3} = 28
\]
So, the value of \(r\) is \(28\).
\[
4 \cdot 21 = 3 \cdot r
\]
Calculating the left side:
\[
84 = 3r
\]
Now, divide both sides by 3 to solve for \(r\):
\[
r = \frac{84}{3} = 28
\]
So, the value of \(r\) is \(28\).
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