Respuesta :
Answer:
The value of x is [tex]16\ units[/tex]
Step-by-step explanation:
we know that
If two triangles are similar, then the ratio of its corresponding sides is equal and is called the scale factor
so
[tex]\frac{12}{3} =\frac{x}{4}\\ \\x=12*4/3\\ \\x=16\ units[/tex]