Home / 3,938.20-5,900.82-3,121.72

Finding the Fourth Proportional to 3,938.20, 5,900.82 and 3,121.72

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Solution

The fourth proportional to 3,938.20, 5,900.82 and 3,121.72 is: 4,677.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.20 : 5,900.82 = 3,121.72 : x
  2. Step 2: Convert to fraction form
    3,938.20/5,900.82 = 3,121.72/x
  3. Step 3: Cross multiply
    3,938.20x = 5,900.82 × 3,121.72
  4. Step 4: Simplify right side
    3,938.20x = 18,420,707.81
  5. Step 5: Solve for x
    x = 18,420,707.81/3,938.20
  6. Step 6: Final answer
    x = 4,677.44

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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.