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Finding the Third Proportional to 18,954 and 40,815

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Solution

The third proportional to 18,954 and 40,815 is: 87,889.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954 : 40,815 = 40,815 : x
  2. Step 2: Convert to fraction form
    18,954/40,815 = 40,815/x
  3. Step 3: Cross multiply
    18,954x = 40,815 × 40,815
  4. Step 4: Simplify right side
    18,954x = 1,665,864,225
  5. Step 5: Solve for x
    x = 1,665,864,225/18,954
  6. Step 6: Final answer
    x = 87,889.85

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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.