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Finding the Third Proportional to 8,917 and 13,862

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Solution

The third proportional to 8,917 and 13,862 is: 21,549.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,917 : 13,862 = 13,862 : x
  2. Step 2: Convert to fraction form
    8,917/13,862 = 13,862/x
  3. Step 3: Cross multiply
    8,917x = 13,862 × 13,862
  4. Step 4: Simplify right side
    8,917x = 192,155,044
  5. Step 5: Solve for x
    x = 192,155,044/8,917
  6. Step 6: Final answer
    x = 21,549.29

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.