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Finding the Third Proportional to 15,987 and 25,539

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Solution

The third proportional to 15,987 and 25,539 is: 40,798.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,987 : 25,539 = 25,539 : x
  2. Step 2: Convert to fraction form
    15,987/25,539 = 25,539/x
  3. Step 3: Cross multiply
    15,987x = 25,539 × 25,539
  4. Step 4: Simplify right side
    15,987x = 652,240,521
  5. Step 5: Solve for x
    x = 652,240,521/15,987
  6. Step 6: Final answer
    x = 40,798.18

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.