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Finding the Third Proportional to 3,021.75 and 3,981

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Solution

The third proportional to 3,021.75 and 3,981 is: 5,244.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,021.75 : 3,981 = 3,981 : x
  2. Step 2: Convert to fraction form
    3,021.75/3,981 = 3,981/x
  3. Step 3: Cross multiply
    3,021.75x = 3,981 × 3,981
  4. Step 4: Simplify right side
    3,021.75x = 15,848,361
  5. Step 5: Solve for x
    x = 15,848,361/3,021.75
  6. Step 6: Final answer
    x = 5,244.76

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.