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Finding the Third Proportional to 18,857 and 40,989

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Solution

The third proportional to 18,857 and 40,989 is: 89,096.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,857 : 40,989 = 40,989 : x
  2. Step 2: Convert to fraction form
    18,857/40,989 = 40,989/x
  3. Step 3: Cross multiply
    18,857x = 40,989 × 40,989
  4. Step 4: Simplify right side
    18,857x = 1,680,098,121
  5. Step 5: Solve for x
    x = 1,680,098,121/18,857
  6. Step 6: Final answer
    x = 89,096.79

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.