Home / 3,909.76-5,395.51-2,231.39

Finding the Fourth Proportional to 3,909.76, 5,395.51 and 2,231.39

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Solution

The fourth proportional to 3,909.76, 5,395.51 and 2,231.39 is: 3,079.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.76 : 5,395.51 = 2,231.39 : x
  2. Step 2: Convert to fraction form
    3,909.76/5,395.51 = 2,231.39/x
  3. Step 3: Cross multiply
    3,909.76x = 5,395.51 × 2,231.39
  4. Step 4: Simplify right side
    3,909.76x = 12,039,487.06
  5. Step 5: Solve for x
    x = 12,039,487.06/3,909.76
  6. Step 6: Final answer
    x = 3,079.34

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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.