### Home > MC2 > Chapter 9 > Lesson 9.2.1 > Problem9-45

9-45.

Michaela is swimming at a rate of $25$ feet in $4$ minutes. At this rate, how far will she swim in $15$ minutes?

Identify this as a proportional relationship problem.

One ratio could be $25$ feet:$4$ minutes.
What would be the corresponding equivalent ratio?

Cross multiplication method: $\frac{25\ \text{feet}}{4\ \text{minutes}}=\frac{x\ \text{feet}}{15\ \text{minutes}}$

$25(15)=x(4)$

Solve for $x$.

$93.75$ feet