Home / 3,912.21-5,395.50-2,850.30

Finding the Fourth Proportional to 3,912.21, 5,395.50 and 2,850.30

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Solution

The fourth proportional to 3,912.21, 5,395.50 and 2,850.30 is: 3,930.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.21 : 5,395.50 = 2,850.30 : x
  2. Step 2: Convert to fraction form
    3,912.21/5,395.50 = 2,850.30/x
  3. Step 3: Cross multiply
    3,912.21x = 5,395.50 × 2,850.30
  4. Step 4: Simplify right side
    3,912.21x = 15,378,793.65
  5. Step 5: Solve for x
    x = 15,378,793.65/3,912.21
  6. Step 6: Final answer
    x = 3,930.97

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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.