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Finding the Third Proportional to 8,472 and 13,740

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Solution

The third proportional to 8,472 and 13,740 is: 22,283.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,472 : 13,740 = 13,740 : x
  2. Step 2: Convert to fraction form
    8,472/13,740 = 13,740/x
  3. Step 3: Cross multiply
    8,472x = 13,740 × 13,740
  4. Step 4: Simplify right side
    8,472x = 188,787,600
  5. Step 5: Solve for x
    x = 188,787,600/8,472
  6. Step 6: Final answer
    x = 22,283.71

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Why These Related Problems?

These problems maintain the same ratio (1.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.