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Finding the Third Proportional to 18,831 and 40,161

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Solution

The third proportional to 18,831 and 40,161 is: 85,651.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,831 : 40,161 = 40,161 : x
  2. Step 2: Convert to fraction form
    18,831/40,161 = 40,161/x
  3. Step 3: Cross multiply
    18,831x = 40,161 × 40,161
  4. Step 4: Simplify right side
    18,831x = 1,612,905,921
  5. Step 5: Solve for x
    x = 1,612,905,921/18,831
  6. Step 6: Final answer
    x = 85,651.63

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.