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Finding the Third Proportional to 4,279 and 8,972

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Solution

The third proportional to 4,279 and 8,972 is: 18,812.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,279 : 8,972 = 8,972 : x
  2. Step 2: Convert to fraction form
    4,279/8,972 = 8,972/x
  3. Step 3: Cross multiply
    4,279x = 8,972 × 8,972
  4. Step 4: Simplify right side
    4,279x = 80,496,784
  5. Step 5: Solve for x
    x = 80,496,784/4,279
  6. Step 6: Final answer
    x = 18,812.06

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.