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Finding the Third Proportional to 16,320 and 18,408

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Solution

The third proportional to 16,320 and 18,408 is: 20,763.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,320 : 18,408 = 18,408 : x
  2. Step 2: Convert to fraction form
    16,320/18,408 = 18,408/x
  3. Step 3: Cross multiply
    16,320x = 18,408 × 18,408
  4. Step 4: Simplify right side
    16,320x = 338,854,464
  5. Step 5: Solve for x
    x = 338,854,464/16,320
  6. Step 6: Final answer
    x = 20,763.14

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.