Home / 3,431.30-5,147.31-2,131.70

Finding the Fourth Proportional to 3,431.30, 5,147.31 and 2,131.70

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Solution

The fourth proportional to 3,431.30, 5,147.31 and 2,131.70 is: 3,197.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.30 : 5,147.31 = 2,131.70 : x
  2. Step 2: Convert to fraction form
    3,431.30/5,147.31 = 2,131.70/x
  3. Step 3: Cross multiply
    3,431.30x = 5,147.31 × 2,131.70
  4. Step 4: Simplify right side
    3,431.30x = 10,972,520.73
  5. Step 5: Solve for x
    x = 10,972,520.73/3,431.30
  6. Step 6: Final answer
    x = 3,197.77

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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.