Home / 3,930.30-5,892.45-1,983.90

Finding the Fourth Proportional to 3,930.30, 5,892.45 and 1,983.90

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Solution

The fourth proportional to 3,930.30, 5,892.45 and 1,983.90 is: 2,974.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.30 : 5,892.45 = 1,983.90 : x
  2. Step 2: Convert to fraction form
    3,930.30/5,892.45 = 1,983.90/x
  3. Step 3: Cross multiply
    3,930.30x = 5,892.45 × 1,983.90
  4. Step 4: Simplify right side
    3,930.30x = 11,690,031.56
  5. Step 5: Solve for x
    x = 11,690,031.56/3,930.30
  6. Step 6: Final answer
    x = 2,974.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.