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Finding the Third Proportional to 18,724.50 and 40,203

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Solution

The third proportional to 18,724.50 and 40,203 is: 86,319.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,724.50 : 40,203 = 40,203 : x
  2. Step 2: Convert to fraction form
    18,724.50/40,203 = 40,203/x
  3. Step 3: Cross multiply
    18,724.50x = 40,203 × 40,203
  4. Step 4: Simplify right side
    18,724.50x = 1,616,281,209
  5. Step 5: Solve for x
    x = 1,616,281,209/18,724.50
  6. Step 6: Final answer
    x = 86,319.06

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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.