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Finding the Third Proportional to 8,432 and 10,920

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Solution

The third proportional to 8,432 and 10,920 is: 14,142.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,432 : 10,920 = 10,920 : x
  2. Step 2: Convert to fraction form
    8,432/10,920 = 10,920/x
  3. Step 3: Cross multiply
    8,432x = 10,920 × 10,920
  4. Step 4: Simplify right side
    8,432x = 119,246,400
  5. Step 5: Solve for x
    x = 119,246,400/8,432
  6. Step 6: Final answer
    x = 14,142.13

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.