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Finding the Third Proportional to 15,408 and 16,656

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Solution

The third proportional to 15,408 and 16,656 is: 18,005.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,408 : 16,656 = 16,656 : x
  2. Step 2: Convert to fraction form
    15,408/16,656 = 16,656/x
  3. Step 3: Cross multiply
    15,408x = 16,656 × 16,656
  4. Step 4: Simplify right side
    15,408x = 277,422,336
  5. Step 5: Solve for x
    x = 277,422,336/15,408
  6. Step 6: Final answer
    x = 18,005.08

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.