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Finding the Third Proportional to 8,987 and 19,687

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Solution

The third proportional to 8,987 and 19,687 is: 43,126.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987 : 19,687 = 19,687 : x
  2. Step 2: Convert to fraction form
    8,987/19,687 = 19,687/x
  3. Step 3: Cross multiply
    8,987x = 19,687 × 19,687
  4. Step 4: Simplify right side
    8,987x = 387,577,969
  5. Step 5: Solve for x
    x = 387,577,969/8,987
  6. Step 6: Final answer
    x = 43,126.51

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.