Home / 5,129.62-7,687.05-3,180.70

Finding the Fourth Proportional to 5,129.62, 7,687.05 and 3,180.70

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Solution

The fourth proportional to 5,129.62, 7,687.05 and 3,180.70 is: 4,766.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.62 : 7,687.05 = 3,180.70 : x
  2. Step 2: Convert to fraction form
    5,129.62/7,687.05 = 3,180.70/x
  3. Step 3: Cross multiply
    5,129.62x = 7,687.05 × 3,180.70
  4. Step 4: Simplify right side
    5,129.62x = 24,450,199.94
  5. Step 5: Solve for x
    x = 24,450,199.94/5,129.62
  6. Step 6: Final answer
    x = 4,766.47

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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.