Home / 3,179.09-4,387.23-2,115.02

Finding the Fourth Proportional to 3,179.09, 4,387.23 and 2,115.02

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Solution

The fourth proportional to 3,179.09, 4,387.23 and 2,115.02 is: 2,918.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,179.09 : 4,387.23 = 2,115.02 : x
  2. Step 2: Convert to fraction form
    3,179.09/4,387.23 = 2,115.02/x
  3. Step 3: Cross multiply
    3,179.09x = 4,387.23 × 2,115.02
  4. Step 4: Simplify right side
    3,179.09x = 9,279,057.26
  5. Step 5: Solve for x
    x = 9,279,057.26/3,179.09
  6. Step 6: Final answer
    x = 2,918.78

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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.