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Finding the Third Proportional to 14,920 and 21,759

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Solution

The third proportional to 14,920 and 21,759 is: 31,732.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,920 : 21,759 = 21,759 : x
  2. Step 2: Convert to fraction form
    14,920/21,759 = 21,759/x
  3. Step 3: Cross multiply
    14,920x = 21,759 × 21,759
  4. Step 4: Simplify right side
    14,920x = 473,454,081
  5. Step 5: Solve for x
    x = 473,454,081/14,920
  6. Step 6: Final answer
    x = 31,732.85

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.