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Finding the Third Proportional to 13,174 and 31,489

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Solution

The third proportional to 13,174 and 31,489 is: 75,266.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,174 : 31,489 = 31,489 : x
  2. Step 2: Convert to fraction form
    13,174/31,489 = 31,489/x
  3. Step 3: Cross multiply
    13,174x = 31,489 × 31,489
  4. Step 4: Simplify right side
    13,174x = 991,557,121
  5. Step 5: Solve for x
    x = 991,557,121/13,174
  6. Step 6: Final answer
    x = 75,266.22

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Why These Related Problems?

These problems maintain the same ratio (2.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.