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Finding the Third Proportional to 18,987 and 40,899

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Solution

The third proportional to 18,987 and 40,899 is: 88,098.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987 : 40,899 = 40,899 : x
  2. Step 2: Convert to fraction form
    18,987/40,899 = 40,899/x
  3. Step 3: Cross multiply
    18,987x = 40,899 × 40,899
  4. Step 4: Simplify right side
    18,987x = 1,672,728,201
  5. Step 5: Solve for x
    x = 1,672,728,201/18,987
  6. Step 6: Final answer
    x = 88,098.60

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.