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Finding the Third Proportional to 8,120 and 11,472

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Solution

The third proportional to 8,120 and 11,472 is: 16,207.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120 : 11,472 = 11,472 : x
  2. Step 2: Convert to fraction form
    8,120/11,472 = 11,472/x
  3. Step 3: Cross multiply
    8,120x = 11,472 × 11,472
  4. Step 4: Simplify right side
    8,120x = 131,606,784
  5. Step 5: Solve for x
    x = 131,606,784/8,120
  6. Step 6: Final answer
    x = 16,207.73

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.