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Finding the Third Proportional to 18,516 and 40,190

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Solution

The third proportional to 18,516 and 40,190 is: 87,234.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,516 : 40,190 = 40,190 : x
  2. Step 2: Convert to fraction form
    18,516/40,190 = 40,190/x
  3. Step 3: Cross multiply
    18,516x = 40,190 × 40,190
  4. Step 4: Simplify right side
    18,516x = 1,615,236,100
  5. Step 5: Solve for x
    x = 1,615,236,100/18,516
  6. Step 6: Final answer
    x = 87,234.61

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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.