Home / 3,131.87-4,321.35-2,661.66

Finding the Fourth Proportional to 3,131.87, 4,321.35 and 2,661.66

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Solution

The fourth proportional to 3,131.87, 4,321.35 and 2,661.66 is: 3,672.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.87 : 4,321.35 = 2,661.66 : x
  2. Step 2: Convert to fraction form
    3,131.87/4,321.35 = 2,661.66/x
  3. Step 3: Cross multiply
    3,131.87x = 4,321.35 × 2,661.66
  4. Step 4: Simplify right side
    3,131.87x = 11,501,964.44
  5. Step 5: Solve for x
    x = 11,501,964.44/3,131.87
  6. Step 6: Final answer
    x = 3,672.56

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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.