Home / 3,131.86-4,321.65-1,872.66

Finding the Fourth Proportional to 3,131.86, 4,321.65 and 1,872.66

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Solution

The fourth proportional to 3,131.86, 4,321.65 and 1,872.66 is: 2,584.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.86 : 4,321.65 = 1,872.66 : x
  2. Step 2: Convert to fraction form
    3,131.86/4,321.65 = 1,872.66/x
  3. Step 3: Cross multiply
    3,131.86x = 4,321.65 × 1,872.66
  4. Step 4: Simplify right side
    3,131.86x = 8,092,996.57
  5. Step 5: Solve for x
    x = 8,092,996.57/3,131.86
  6. Step 6: Final answer
    x = 2,584.09

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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.