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Finding the Third Proportional to 15,424 and 16,864

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Solution

The third proportional to 15,424 and 16,864 is: 18,438.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,424 : 16,864 = 16,864 : x
  2. Step 2: Convert to fraction form
    15,424/16,864 = 16,864/x
  3. Step 3: Cross multiply
    15,424x = 16,864 × 16,864
  4. Step 4: Simplify right side
    15,424x = 284,394,496
  5. Step 5: Solve for x
    x = 284,394,496/15,424
  6. Step 6: Final answer
    x = 18,438.44

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.