13,7/4=9t/3,6

To solve the proportion \( \frac{13.7}{4} = \frac{9t}{3.6} \), we can use cross-multiplication:

1. Multiply 13.7 by 3.6.
2. Multiply 4 by 9t.

This gives the equation:

\[ 13.7 \times 3.6 = 4 \times 9t \]

Calculate the values:

\[ 49.32 = 36t \]

Now, solve for \( t \):

\[ t = \frac{49.32}{36} \]

\[ t \approx 1.37 \]

So, \( t \approx 1.37 \).