Home / 3,909.16-5,395.78-2,231.49

Finding the Fourth Proportional to 3,909.16, 5,395.78 and 2,231.49

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Solution

The fourth proportional to 3,909.16, 5,395.78 and 2,231.49 is: 3,080.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.16 : 5,395.78 = 2,231.49 : x
  2. Step 2: Convert to fraction form
    3,909.16/5,395.78 = 2,231.49/x
  3. Step 3: Cross multiply
    3,909.16x = 5,395.78 × 2,231.49
  4. Step 4: Simplify right side
    3,909.16x = 12,040,629.11
  5. Step 5: Solve for x
    x = 12,040,629.11/3,909.16
  6. Step 6: Final answer
    x = 3,080.11

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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.