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Finding the Third Proportional to 18,405 and 38,998

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Solution

The third proportional to 18,405 and 38,998 is: 82,632.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,405 : 38,998 = 38,998 : x
  2. Step 2: Convert to fraction form
    18,405/38,998 = 38,998/x
  3. Step 3: Cross multiply
    18,405x = 38,998 × 38,998
  4. Step 4: Simplify right side
    18,405x = 1,520,844,004
  5. Step 5: Solve for x
    x = 1,520,844,004/18,405
  6. Step 6: Final answer
    x = 82,632.11

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.