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Finding the Third Proportional to 18,538 and 40,388

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Solution

The third proportional to 18,538 and 40,388 is: 87,991.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,538 : 40,388 = 40,388 : x
  2. Step 2: Convert to fraction form
    18,538/40,388 = 40,388/x
  3. Step 3: Cross multiply
    18,538x = 40,388 × 40,388
  4. Step 4: Simplify right side
    18,538x = 1,631,190,544
  5. Step 5: Solve for x
    x = 1,631,190,544/18,538
  6. Step 6: Final answer
    x = 87,991.72

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.