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Finding the Third Proportional to 3,972 and 9,174

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Solution

The third proportional to 3,972 and 9,174 is: 21,188.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,972 : 9,174 = 9,174 : x
  2. Step 2: Convert to fraction form
    3,972/9,174 = 9,174/x
  3. Step 3: Cross multiply
    3,972x = 9,174 × 9,174
  4. Step 4: Simplify right side
    3,972x = 84,162,276
  5. Step 5: Solve for x
    x = 84,162,276/3,972
  6. Step 6: Final answer
    x = 21,188.89

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.