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Finding the Third Proportional to 11,900 and 16,920

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Solution

The third proportional to 11,900 and 16,920 is: 24,057.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,900 : 16,920 = 16,920 : x
  2. Step 2: Convert to fraction form
    11,900/16,920 = 16,920/x
  3. Step 3: Cross multiply
    11,900x = 16,920 × 16,920
  4. Step 4: Simplify right side
    11,900x = 286,286,400
  5. Step 5: Solve for x
    x = 286,286,400/11,900
  6. Step 6: Final answer
    x = 24,057.68

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.