What is the value of x in the diagram below?

Answer:
option B is the right option.
Step-by-step explanation:
[tex] \frac{bc}{ab} = \frac{ab}{bd} [/tex]
Plug the values:
[tex] \frac{20}{12} = \frac{12}{x} [/tex]
Apply cross product property
[tex]20 \times x = 12 \times 12[/tex]
Calculate the product
[tex]20x = 144[/tex]
divide both sides of the equation by 20
[tex] \frac{20x}{20} = \frac{144}{20} [/tex]
Calculate:
[tex]x = 7.2[/tex]
hope this helps..
Good luck...