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Finding the Third Proportional to 17,987 and 39,543

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Solution

The third proportional to 17,987 and 39,543 is: 86,932.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,987 : 39,543 = 39,543 : x
  2. Step 2: Convert to fraction form
    17,987/39,543 = 39,543/x
  3. Step 3: Cross multiply
    17,987x = 39,543 × 39,543
  4. Step 4: Simplify right side
    17,987x = 1,563,648,849
  5. Step 5: Solve for x
    x = 1,563,648,849/17,987
  6. Step 6: Final answer
    x = 86,932.16

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.