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Finding the Third Proportional to 13,691 and 29,782

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Solution

The third proportional to 13,691 and 29,782 is: 64,784.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691 : 29,782 = 29,782 : x
  2. Step 2: Convert to fraction form
    13,691/29,782 = 29,782/x
  3. Step 3: Cross multiply
    13,691x = 29,782 × 29,782
  4. Step 4: Simplify right side
    13,691x = 886,967,524
  5. Step 5: Solve for x
    x = 886,967,524/13,691
  6. Step 6: Final answer
    x = 64,784.71

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.