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Finding the Third Proportional to 8,118 and 12,519

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Solution

The third proportional to 8,118 and 12,519 is: 19,305.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118 : 12,519 = 12,519 : x
  2. Step 2: Convert to fraction form
    8,118/12,519 = 12,519/x
  3. Step 3: Cross multiply
    8,118x = 12,519 × 12,519
  4. Step 4: Simplify right side
    8,118x = 156,725,361
  5. Step 5: Solve for x
    x = 156,725,361/8,118
  6. Step 6: Final answer
    x = 19,305.91

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.