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Finding the Third Proportional to 12,997.50 and 19,701

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Solution

The third proportional to 12,997.50 and 19,701 is: 29,861.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,997.50 : 19,701 = 19,701 : x
  2. Step 2: Convert to fraction form
    12,997.50/19,701 = 19,701/x
  3. Step 3: Cross multiply
    12,997.50x = 19,701 × 19,701
  4. Step 4: Simplify right side
    12,997.50x = 388,129,401
  5. Step 5: Solve for x
    x = 388,129,401/12,997.50
  6. Step 6: Final answer
    x = 29,861.85

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.