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Finding the Third Proportional to 3,986 and 7,402

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Solution

The third proportional to 3,986 and 7,402 is: 13,745.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986 : 7,402 = 7,402 : x
  2. Step 2: Convert to fraction form
    3,986/7,402 = 7,402/x
  3. Step 3: Cross multiply
    3,986x = 7,402 × 7,402
  4. Step 4: Simplify right side
    3,986x = 54,789,604
  5. Step 5: Solve for x
    x = 54,789,604/3,986
  6. Step 6: Final answer
    x = 13,745.51

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Why These Related Problems?

These problems maintain the same ratio (1.86) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.