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Finding the Third Proportional to 8,691 and 21,006

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Solution

The third proportional to 8,691 and 21,006 is: 50,771.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691 : 21,006 = 21,006 : x
  2. Step 2: Convert to fraction form
    8,691/21,006 = 21,006/x
  3. Step 3: Cross multiply
    8,691x = 21,006 × 21,006
  4. Step 4: Simplify right side
    8,691x = 441,252,036
  5. Step 5: Solve for x
    x = 441,252,036/8,691
  6. Step 6: Final answer
    x = 50,771.15

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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.