To find the value of \( n \) that makes the ratios equivalent, we can set up the equation based on the given proportion:
\[ \frac{5}{4} = \frac{30}{n} \]
To solve for \( n \), we can cross-multiply:
\[ 5n = 4 \times 30 \]
Calculating \( 4 \times 30 \):
\[ 4 \times 30 = 120 \]
Now, we have:
\[ 5n = 120 \]
Next, we can solve for \( n \) by dividing both sides by 5:
\[ n = \frac{120}{5} = 24 \]
Thus, the value of \( n \) is:
\[ \boxed{24} \]