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Finding the Third Proportional to 3,980 and 8,203

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Solution

The third proportional to 3,980 and 8,203 is: 16,906.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980 : 8,203 = 8,203 : x
  2. Step 2: Convert to fraction form
    3,980/8,203 = 8,203/x
  3. Step 3: Cross multiply
    3,980x = 8,203 × 8,203
  4. Step 4: Simplify right side
    3,980x = 67,289,209
  5. Step 5: Solve for x
    x = 67,289,209/3,980
  6. Step 6: Final answer
    x = 16,906.84

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.