Home / 5,156.20-7,720.45-4,242.78

Finding the Fourth Proportional to 5,156.20, 7,720.45 and 4,242.78

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Solution

The fourth proportional to 5,156.20, 7,720.45 and 4,242.78 is: 6,352.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.20 : 7,720.45 = 4,242.78 : x
  2. Step 2: Convert to fraction form
    5,156.20/7,720.45 = 4,242.78/x
  3. Step 3: Cross multiply
    5,156.20x = 7,720.45 × 4,242.78
  4. Step 4: Simplify right side
    5,156.20x = 32,756,170.85
  5. Step 5: Solve for x
    x = 32,756,170.85/5,156.20
  6. Step 6: Final answer
    x = 6,352.77

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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.