Home / 3,899.50-5,381.37-2,131.27

Finding the Fourth Proportional to 3,899.50, 5,381.37 and 2,131.27

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Solution

The fourth proportional to 3,899.50, 5,381.37 and 2,131.27 is: 2,941.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.50 : 5,381.37 = 2,131.27 : x
  2. Step 2: Convert to fraction form
    3,899.50/5,381.37 = 2,131.27/x
  3. Step 3: Cross multiply
    3,899.50x = 5,381.37 × 2,131.27
  4. Step 4: Simplify right side
    3,899.50x = 11,469,138.99
  5. Step 5: Solve for x
    x = 11,469,138.99/3,899.50
  6. Step 6: Final answer
    x = 2,941.18

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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.