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Finding the Third Proportional to 8,781.75 and 16,687.69

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Solution

The third proportional to 8,781.75 and 16,687.69 is: 31,711.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.75 : 16,687.69 = 16,687.69 : x
  2. Step 2: Convert to fraction form
    8,781.75/16,687.69 = 16,687.69/x
  3. Step 3: Cross multiply
    8,781.75x = 16,687.69 × 16,687.69
  4. Step 4: Simplify right side
    8,781.75x = 278,478,914.10
  5. Step 5: Solve for x
    x = 278,478,914.10/8,781.75
  6. Step 6: Final answer
    x = 31,711.10

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Why These Related Problems?

These problems maintain the same ratio (1.90) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.