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Finding the Third Proportional to 8,918 and 21,587

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Solution

The third proportional to 8,918 and 21,587 is: 52,253.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918 : 21,587 = 21,587 : x
  2. Step 2: Convert to fraction form
    8,918/21,587 = 21,587/x
  3. Step 3: Cross multiply
    8,918x = 21,587 × 21,587
  4. Step 4: Simplify right side
    8,918x = 465,998,569
  5. Step 5: Solve for x
    x = 465,998,569/8,918
  6. Step 6: Final answer
    x = 52,253.71

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Why These Related Problems?

These problems maintain the same ratio (2.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.