Home / 6,391.20-9,579.15-3,759.96

Finding the Fourth Proportional to 6,391.20, 9,579.15 and 3,759.96

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Solution

The fourth proportional to 6,391.20, 9,579.15 and 3,759.96 is: 5,635.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,391.20 : 9,579.15 = 3,759.96 : x
  2. Step 2: Convert to fraction form
    6,391.20/9,579.15 = 3,759.96/x
  3. Step 3: Cross multiply
    6,391.20x = 9,579.15 × 3,759.96
  4. Step 4: Simplify right side
    6,391.20x = 36,017,220.83
  5. Step 5: Solve for x
    x = 36,017,220.83/6,391.20
  6. Step 6: Final answer
    x = 5,635.44

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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.