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Finding the Third Proportional to 3,980 and 6,132

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Solution

The third proportional to 3,980 and 6,132 is: 9,447.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980 : 6,132 = 6,132 : x
  2. Step 2: Convert to fraction form
    3,980/6,132 = 6,132/x
  3. Step 3: Cross multiply
    3,980x = 6,132 × 6,132
  4. Step 4: Simplify right side
    3,980x = 37,601,424
  5. Step 5: Solve for x
    x = 37,601,424/3,980
  6. Step 6: Final answer
    x = 9,447.59

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.