Home / 3,849.76-5,311.38-2,170.90

Finding the Fourth Proportional to 3,849.76, 5,311.38 and 2,170.90

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Solution

The fourth proportional to 3,849.76, 5,311.38 and 2,170.90 is: 2,995.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,849.76 : 5,311.38 = 2,170.90 : x
  2. Step 2: Convert to fraction form
    3,849.76/5,311.38 = 2,170.90/x
  3. Step 3: Cross multiply
    3,849.76x = 5,311.38 × 2,170.90
  4. Step 4: Simplify right side
    3,849.76x = 11,530,474.84
  5. Step 5: Solve for x
    x = 11,530,474.84/3,849.76
  6. Step 6: Final answer
    x = 2,995.12

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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.