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Finding the Third Proportional to 3,980 and 9,392

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Solution

The third proportional to 3,980 and 9,392 is: 22,163.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980 : 9,392 = 9,392 : x
  2. Step 2: Convert to fraction form
    3,980/9,392 = 9,392/x
  3. Step 3: Cross multiply
    3,980x = 9,392 × 9,392
  4. Step 4: Simplify right side
    3,980x = 88,209,664
  5. Step 5: Solve for x
    x = 88,209,664/3,980
  6. Step 6: Final answer
    x = 22,163.23

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.