Home / 3,138.10-4,331.49-1,960.90

Finding the Fourth Proportional to 3,138.10, 4,331.49 and 1,960.90

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Solution

The fourth proportional to 3,138.10, 4,331.49 and 1,960.90 is: 2,706.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.10 : 4,331.49 = 1,960.90 : x
  2. Step 2: Convert to fraction form
    3,138.10/4,331.49 = 1,960.90/x
  3. Step 3: Cross multiply
    3,138.10x = 4,331.49 × 1,960.90
  4. Step 4: Simplify right side
    3,138.10x = 8,493,618.74
  5. Step 5: Solve for x
    x = 8,493,618.74/3,138.10
  6. Step 6: Final answer
    x = 2,706.61

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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.