Home / 5,311.85-7,961.51-2,190.31

Finding the Fourth Proportional to 5,311.85, 7,961.51 and 2,190.31

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Solution

The fourth proportional to 5,311.85, 7,961.51 and 2,190.31 is: 3,282.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,311.85 : 7,961.51 = 2,190.31 : x
  2. Step 2: Convert to fraction form
    5,311.85/7,961.51 = 2,190.31/x
  3. Step 3: Cross multiply
    5,311.85x = 7,961.51 × 2,190.31
  4. Step 4: Simplify right side
    5,311.85x = 17,438,160.54
  5. Step 5: Solve for x
    x = 17,438,160.54/5,311.85
  6. Step 6: Final answer
    x = 3,282.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.