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Finding the Fourth Proportional to 7,540.80, 11,311.20 and 5,596.80

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Solution

The fourth proportional to 7,540.80, 11,311.20 and 5,596.80 is: 8,395.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,540.80 : 11,311.20 = 5,596.80 : x
  2. Step 2: Convert to fraction form
    7,540.80/11,311.20 = 5,596.80/x
  3. Step 3: Cross multiply
    7,540.80x = 11,311.20 × 5,596.80
  4. Step 4: Simplify right side
    7,540.80x = 63,306,524.16
  5. Step 5: Solve for x
    x = 63,306,524.16/7,540.80
  6. Step 6: Final answer
    x = 8,395.20

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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.