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Finding the Third Proportional to 9,687 and 20,539

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Solution

The third proportional to 9,687 and 20,539 is: 43,548.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,687 : 20,539 = 20,539 : x
  2. Step 2: Convert to fraction form
    9,687/20,539 = 20,539/x
  3. Step 3: Cross multiply
    9,687x = 20,539 × 20,539
  4. Step 4: Simplify right side
    9,687x = 421,850,521
  5. Step 5: Solve for x
    x = 421,850,521/9,687
  6. Step 6: Final answer
    x = 43,548.11

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.