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Finding the Third Proportional to 6,408 and 13,680

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Solution

The third proportional to 6,408 and 13,680 is: 29,204.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,408 : 13,680 = 13,680 : x
  2. Step 2: Convert to fraction form
    6,408/13,680 = 13,680/x
  3. Step 3: Cross multiply
    6,408x = 13,680 × 13,680
  4. Step 4: Simplify right side
    6,408x = 187,142,400
  5. Step 5: Solve for x
    x = 187,142,400/6,408
  6. Step 6: Final answer
    x = 29,204.49

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.