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Finding the Third Proportional to 20,612 and 38,280

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Solution

The third proportional to 20,612 and 38,280 is: 71,092.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612 : 38,280 = 38,280 : x
  2. Step 2: Convert to fraction form
    20,612/38,280 = 38,280/x
  3. Step 3: Cross multiply
    20,612x = 38,280 × 38,280
  4. Step 4: Simplify right side
    20,612x = 1,465,358,400
  5. Step 5: Solve for x
    x = 1,465,358,400/20,612
  6. Step 6: Final answer
    x = 71,092.49

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Why These Related Problems?

These problems maintain the same ratio (1.86) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.