Home / 5,399.20-8,098.80-2,807.20

Finding the Fourth Proportional to 5,399.20, 8,098.80 and 2,807.20

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Solution

The fourth proportional to 5,399.20, 8,098.80 and 2,807.20 is: 4,210.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,399.20 : 8,098.80 = 2,807.20 : x
  2. Step 2: Convert to fraction form
    5,399.20/8,098.80 = 2,807.20/x
  3. Step 3: Cross multiply
    5,399.20x = 8,098.80 × 2,807.20
  4. Step 4: Simplify right side
    5,399.20x = 22,734,951.36
  5. Step 5: Solve for x
    x = 22,734,951.36/5,399.20
  6. Step 6: Final answer
    x = 4,210.80

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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.