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Finding the Third Proportional to 18,758 and 40,405

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Solution

The third proportional to 18,758 and 40,405 is: 87,032.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758 : 40,405 = 40,405 : x
  2. Step 2: Convert to fraction form
    18,758/40,405 = 40,405/x
  3. Step 3: Cross multiply
    18,758x = 40,405 × 40,405
  4. Step 4: Simplify right side
    18,758x = 1,632,564,025
  5. Step 5: Solve for x
    x = 1,632,564,025/18,758
  6. Step 6: Final answer
    x = 87,032.95

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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.