Equivalent ratios: \( \frac{9}{12} = \frac{6}{x} \).<br><br>
&bull; Cross-multiply: 9 &times; x = 12 &times; 6.<br>
&bull; 9x = 72.<br>
&bull; x = 72 &divide; 9 = 8.<br><br>
Final Answer: 8