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Finding the Third Proportional to 18,399 and 40,000

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Solution

The third proportional to 18,399 and 40,000 is: 86,961.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,399 : 40,000 = 40,000 : x
  2. Step 2: Convert to fraction form
    18,399/40,000 = 40,000/x
  3. Step 3: Cross multiply
    18,399x = 40,000 × 40,000
  4. Step 4: Simplify right side
    18,399x = 1,600,000,000
  5. Step 5: Solve for x
    x = 1,600,000,000/18,399
  6. Step 6: Final answer
    x = 86,961.25

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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.