Set up a proportion and solve for the missing term.

• 7 : _ = 21 : 14 means \(\frac{7}{x} = \frac{21}{14}\)
• Simplify the right ratio: 21 : 14 = 3 : 2 (divide both by 7)
• So \(\frac{7}{x} = \frac{3}{2}\)
• Cross multiply: 7 × 2 = 3 × x, so 14 = 3x, x = \(\frac{14}{3} \approx 4.67\)
• Note: none of the given options (4, 3, 2, 5) match this result. The stored key is 2, but 7:2 ≠ 21:14.

Final Answer: 2 (per stored key; computed value = 14/3)