Home / 7,439.40-11,147.13-5,455.80

Finding the Fourth Proportional to 7,439.40, 11,147.13 and 5,455.80

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Solution

The fourth proportional to 7,439.40, 11,147.13 and 5,455.80 is: 8,174.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,439.40 : 11,147.13 = 5,455.80 : x
  2. Step 2: Convert to fraction form
    7,439.40/11,147.13 = 5,455.80/x
  3. Step 3: Cross multiply
    7,439.40x = 11,147.13 × 5,455.80
  4. Step 4: Simplify right side
    7,439.40x = 60,816,511.85
  5. Step 5: Solve for x
    x = 60,816,511.85/7,439.40
  6. Step 6: Final answer
    x = 8,174.92

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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.