Home / 3,121.15-4,305.82-2,057.55

Finding the Fourth Proportional to 3,121.15, 4,305.82 and 2,057.55

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Solution

The fourth proportional to 3,121.15, 4,305.82 and 2,057.55 is: 2,838.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.15 : 4,305.82 = 2,057.55 : x
  2. Step 2: Convert to fraction form
    3,121.15/4,305.82 = 2,057.55/x
  3. Step 3: Cross multiply
    3,121.15x = 4,305.82 × 2,057.55
  4. Step 4: Simplify right side
    3,121.15x = 8,859,439.94
  5. Step 5: Solve for x
    x = 8,859,439.94/3,121.15
  6. Step 6: Final answer
    x = 2,838.52

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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.