Home / 3,131.74-4,319.39-2,187.22

Finding the Fourth Proportional to 3,131.74, 4,319.39 and 2,187.22

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Solution

The fourth proportional to 3,131.74, 4,319.39 and 2,187.22 is: 3,016.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.74 : 4,319.39 = 2,187.22 : x
  2. Step 2: Convert to fraction form
    3,131.74/4,319.39 = 2,187.22/x
  3. Step 3: Cross multiply
    3,131.74x = 4,319.39 × 2,187.22
  4. Step 4: Simplify right side
    3,131.74x = 9,447,456.20
  5. Step 5: Solve for x
    x = 9,447,456.20/3,131.74
  6. Step 6: Final answer
    x = 3,016.68

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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.