Home / 3,131.27-4,321.13-1,804.95

Finding the Fourth Proportional to 3,131.27, 4,321.13 and 1,804.95

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Solution

The fourth proportional to 3,131.27, 4,321.13 and 1,804.95 is: 2,490.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.27 : 4,321.13 = 1,804.95 : x
  2. Step 2: Convert to fraction form
    3,131.27/4,321.13 = 1,804.95/x
  3. Step 3: Cross multiply
    3,131.27x = 4,321.13 × 1,804.95
  4. Step 4: Simplify right side
    3,131.27x = 7,799,392.96
  5. Step 5: Solve for x
    x = 7,799,392.96/3,131.27
  6. Step 6: Final answer
    x = 2,490.81

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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.