Home / 3,131.61-4,321.31-1,872.41

Finding the Fourth Proportional to 3,131.61, 4,321.31 and 1,872.41

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Solution

The fourth proportional to 3,131.61, 4,321.31 and 1,872.41 is: 2,583.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.61 : 4,321.31 = 1,872.41 : x
  2. Step 2: Convert to fraction form
    3,131.61/4,321.31 = 1,872.41/x
  3. Step 3: Cross multiply
    3,131.61x = 4,321.31 × 1,872.41
  4. Step 4: Simplify right side
    3,131.61x = 8,091,270.18
  5. Step 5: Solve for x
    x = 8,091,270.18/3,131.61
  6. Step 6: Final answer
    x = 2,583.74

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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.