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Finding the Third Proportional to 8,812 and 12,979

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Solution

The third proportional to 8,812 and 12,979 is: 19,116.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,812 : 12,979 = 12,979 : x
  2. Step 2: Convert to fraction form
    8,812/12,979 = 12,979/x
  3. Step 3: Cross multiply
    8,812x = 12,979 × 12,979
  4. Step 4: Simplify right side
    8,812x = 168,454,441
  5. Step 5: Solve for x
    x = 168,454,441/8,812
  6. Step 6: Final answer
    x = 19,116.48

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.