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Finding the Third Proportional to 8,812 and 12,138

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Solution

The third proportional to 8,812 and 12,138 is: 16,719.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,812 : 12,138 = 12,138 : x
  2. Step 2: Convert to fraction form
    8,812/12,138 = 12,138/x
  3. Step 3: Cross multiply
    8,812x = 12,138 × 12,138
  4. Step 4: Simplify right side
    8,812x = 147,331,044
  5. Step 5: Solve for x
    x = 147,331,044/8,812
  6. Step 6: Final answer
    x = 16,719.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.