Home / 7,140.80-10,711.20-5,500.55

Finding the Fourth Proportional to 7,140.80, 10,711.20 and 5,500.55

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Solution

The fourth proportional to 7,140.80, 10,711.20 and 5,500.55 is: 8,250.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.80 : 10,711.20 = 5,500.55 : x
  2. Step 2: Convert to fraction form
    7,140.80/10,711.20 = 5,500.55/x
  3. Step 3: Cross multiply
    7,140.80x = 10,711.20 × 5,500.55
  4. Step 4: Simplify right side
    7,140.80x = 58,917,491.16
  5. Step 5: Solve for x
    x = 58,917,491.16/7,140.80
  6. Step 6: Final answer
    x = 8,250.83

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Double scale
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Similar ratio
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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.