Home / 5,340.80-8,000.40-3,591.20

Finding the Fourth Proportional to 5,340.80, 8,000.40 and 3,591.20

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Solution

The fourth proportional to 5,340.80, 8,000.40 and 3,591.20 is: 5,379.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,340.80 : 8,000.40 = 3,591.20 : x
  2. Step 2: Convert to fraction form
    5,340.80/8,000.40 = 3,591.20/x
  3. Step 3: Cross multiply
    5,340.80x = 8,000.40 × 3,591.20
  4. Step 4: Simplify right side
    5,340.80x = 28,731,036.48
  5. Step 5: Solve for x
    x = 28,731,036.48/5,340.80
  6. Step 6: Final answer
    x = 5,379.54

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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.