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Finding the Third Proportional to 11,872 and 15,432

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Solution

The third proportional to 11,872 and 15,432 is: 20,059.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,872 : 15,432 = 15,432 : x
  2. Step 2: Convert to fraction form
    11,872/15,432 = 15,432/x
  3. Step 3: Cross multiply
    11,872x = 15,432 × 15,432
  4. Step 4: Simplify right side
    11,872x = 238,146,624
  5. Step 5: Solve for x
    x = 238,146,624/11,872
  6. Step 6: Final answer
    x = 20,059.52

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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.