Home / 3,911.57-5,397.94-2,143.18

Finding the Fourth Proportional to 3,911.57, 5,397.94 and 2,143.18

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Solution

The fourth proportional to 3,911.57, 5,397.94 and 2,143.18 is: 2,957.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.57 : 5,397.94 = 2,143.18 : x
  2. Step 2: Convert to fraction form
    3,911.57/5,397.94 = 2,143.18/x
  3. Step 3: Cross multiply
    3,911.57x = 5,397.94 × 2,143.18
  4. Step 4: Simplify right side
    3,911.57x = 11,568,757.05
  5. Step 5: Solve for x
    x = 11,568,757.05/3,911.57
  6. Step 6: Final answer
    x = 2,957.57

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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.