Home / 3,990.22-5,505.66-2,311.53

Finding the Fourth Proportional to 3,990.22, 5,505.66 and 2,311.53

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Solution

The fourth proportional to 3,990.22, 5,505.66 and 2,311.53 is: 3,189.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.22 : 5,505.66 = 2,311.53 : x
  2. Step 2: Convert to fraction form
    3,990.22/5,505.66 = 2,311.53/x
  3. Step 3: Cross multiply
    3,990.22x = 5,505.66 × 2,311.53
  4. Step 4: Simplify right side
    3,990.22x = 12,726,498.26
  5. Step 5: Solve for x
    x = 12,726,498.26/3,990.22
  6. Step 6: Final answer
    x = 3,189.42

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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.