Home / 3,112.70-4,299.72-2,891.27

Finding the Fourth Proportional to 3,112.70, 4,299.72 and 2,891.27

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Solution

The fourth proportional to 3,112.70, 4,299.72 and 2,891.27 is: 3,993.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.70 : 4,299.72 = 2,891.27 : x
  2. Step 2: Convert to fraction form
    3,112.70/4,299.72 = 2,891.27/x
  3. Step 3: Cross multiply
    3,112.70x = 4,299.72 × 2,891.27
  4. Step 4: Simplify right side
    3,112.70x = 12,431,656.91
  5. Step 5: Solve for x
    x = 12,431,656.91/3,112.70
  6. Step 6: Final answer
    x = 3,993.85

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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.