Home / 5,176.50-7,142.85-3,081.78

Finding the Fourth Proportional to 5,176.50, 7,142.85 and 3,081.78

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Solution

The fourth proportional to 5,176.50, 7,142.85 and 3,081.78 is: 4,252.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,176.50 : 7,142.85 = 3,081.78 : x
  2. Step 2: Convert to fraction form
    5,176.50/7,142.85 = 3,081.78/x
  3. Step 3: Cross multiply
    5,176.50x = 7,142.85 × 3,081.78
  4. Step 4: Simplify right side
    5,176.50x = 22,012,692.27
  5. Step 5: Solve for x
    x = 22,012,692.27/5,176.50
  6. Step 6: Final answer
    x = 4,252.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.