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Finding the Third Proportional to 18,771 and 39,699

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Solution

The third proportional to 18,771 and 39,699 is: 83,959.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771 : 39,699 = 39,699 : x
  2. Step 2: Convert to fraction form
    18,771/39,699 = 39,699/x
  3. Step 3: Cross multiply
    18,771x = 39,699 × 39,699
  4. Step 4: Simplify right side
    18,771x = 1,576,010,601
  5. Step 5: Solve for x
    x = 1,576,010,601/18,771
  6. Step 6: Final answer
    x = 83,959.86

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.