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Finding the Third Proportional to 8,644.50 and 13,372

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Solution

The third proportional to 8,644.50 and 13,372 is: 20,684.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,644.50 : 13,372 = 13,372 : x
  2. Step 2: Convert to fraction form
    8,644.50/13,372 = 13,372/x
  3. Step 3: Cross multiply
    8,644.50x = 13,372 × 13,372
  4. Step 4: Simplify right side
    8,644.50x = 178,810,384
  5. Step 5: Solve for x
    x = 178,810,384/8,644.50
  6. Step 6: Final answer
    x = 20,684.87

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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.