Home / 5,318.20-7,979.70-2,543.80

Finding the Fourth Proportional to 5,318.20, 7,979.70 and 2,543.80

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Solution

The fourth proportional to 5,318.20, 7,979.70 and 2,543.80 is: 3,816.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318.20 : 7,979.70 = 2,543.80 : x
  2. Step 2: Convert to fraction form
    5,318.20/7,979.70 = 2,543.80/x
  3. Step 3: Cross multiply
    5,318.20x = 7,979.70 × 2,543.80
  4. Step 4: Simplify right side
    5,318.20x = 20,298,760.86
  5. Step 5: Solve for x
    x = 20,298,760.86/5,318.20
  6. Step 6: Final answer
    x = 3,816.85

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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.