Home / 3,131.80-4,310.92-2,836.55

Finding the Fourth Proportional to 3,131.80, 4,310.92 and 2,836.55

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Solution

The fourth proportional to 3,131.80, 4,310.92 and 2,836.55 is: 3,904.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.80 : 4,310.92 = 2,836.55 : x
  2. Step 2: Convert to fraction form
    3,131.80/4,310.92 = 2,836.55/x
  3. Step 3: Cross multiply
    3,131.80x = 4,310.92 × 2,836.55
  4. Step 4: Simplify right side
    3,131.80x = 12,228,154.45
  5. Step 5: Solve for x
    x = 12,228,154.45/3,131.80
  6. Step 6: Final answer
    x = 3,904.52

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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.