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Finding the Third Proportional to 8,472 and 13,608

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Solution

The third proportional to 8,472 and 13,608 is: 21,857.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,472 : 13,608 = 13,608 : x
  2. Step 2: Convert to fraction form
    8,472/13,608 = 13,608/x
  3. Step 3: Cross multiply
    8,472x = 13,608 × 13,608
  4. Step 4: Simplify right side
    8,472x = 185,177,664
  5. Step 5: Solve for x
    x = 185,177,664/8,472
  6. Step 6: Final answer
    x = 21,857.61

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.