Respuesta :

Answer:

  x = 5.4

Step-by-step explanation:

You want the measure of x in similar quadrilaterals with side ratios ...

  x/3 = 7.2/4.

Solution

Multiplying the above proportion by 3 gives ...

  x = 3(7.2/4) = 3(1.8) = 5.4

The length x is 5.4 units.