$\frac{x}{6}=\frac{15}{18}$

Step 1 ：Given the equation \(\frac{x}{6}=\frac{15}{18}\)

Step 2 ：To solve for x, we can cross-multiply the fractions. This gives us \(x = \frac{15 \times 6}{18}\)

Step 3 ：Solving the above equation gives us the value of x as 7.2

Step 4 ：Final Answer: \(\boxed{7.2}\)