4:5=25:n
You asked:
Solve \(4 : 5=25 : n\) for the variable \(n\).
MathBot Answer:
$$\begin{aligned}n &= \frac{125}{4}\end{aligned}$$
Express both ratios as fractions. \[\frac{4}{5} = \frac{25}{n}\]
Cross-multiply and solve for the unknown. $$\begin{aligned}\frac{4}{5} &= \frac{25}{n} \\ 4 n &= 125 \\ n &&= \frac{125}{4} \end{aligned}$$