Home / 3,849.21-5,311.50-2,170.87

Finding the Fourth Proportional to 3,849.21, 5,311.50 and 2,170.87

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Solution

The fourth proportional to 3,849.21, 5,311.50 and 2,170.87 is: 2,995.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,849.21 : 5,311.50 = 2,170.87 : x
  2. Step 2: Convert to fraction form
    3,849.21/5,311.50 = 2,170.87/x
  3. Step 3: Cross multiply
    3,849.21x = 5,311.50 × 2,170.87
  4. Step 4: Simplify right side
    3,849.21x = 11,530,576.01
  5. Step 5: Solve for x
    x = 11,530,576.01/3,849.21
  6. Step 6: Final answer
    x = 2,995.57

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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.