Home / 5,180.20-7,770.24-3,100.78

Finding the Fourth Proportional to 5,180.20, 7,770.24 and 3,100.78

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Solution

The fourth proportional to 5,180.20, 7,770.24 and 3,100.78 is: 4,651.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,180.20 : 7,770.24 = 3,100.78 : x
  2. Step 2: Convert to fraction form
    5,180.20/7,770.24 = 3,100.78/x
  3. Step 3: Cross multiply
    5,180.20x = 7,770.24 × 3,100.78
  4. Step 4: Simplify right side
    5,180.20x = 24,093,769.86
  5. Step 5: Solve for x
    x = 24,093,769.86/5,180.20
  6. Step 6: Final answer
    x = 4,651.13

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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.