Home / 5,388.80-8,078.40-3,195.20

Finding the Fourth Proportional to 5,388.80, 8,078.40 and 3,195.20

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Solution

The fourth proportional to 5,388.80, 8,078.40 and 3,195.20 is: 4,789.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,388.80 : 8,078.40 = 3,195.20 : x
  2. Step 2: Convert to fraction form
    5,388.80/8,078.40 = 3,195.20/x
  3. Step 3: Cross multiply
    5,388.80x = 8,078.40 × 3,195.20
  4. Step 4: Simplify right side
    5,388.80x = 25,812,103.68
  5. Step 5: Solve for x
    x = 25,812,103.68/5,388.80
  6. Step 6: Final answer
    x = 4,789.95

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1.5x scale

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.