Home / 3,911.50-5,397.87-2,143.11

Finding the Fourth Proportional to 3,911.50, 5,397.87 and 2,143.11

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Solution

The fourth proportional to 3,911.50, 5,397.87 and 2,143.11 is: 2,957.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.50 : 5,397.87 = 2,143.11 : x
  2. Step 2: Convert to fraction form
    3,911.50/5,397.87 = 2,143.11/x
  3. Step 3: Cross multiply
    3,911.50x = 5,397.87 × 2,143.11
  4. Step 4: Simplify right side
    3,911.50x = 11,568,229.18
  5. Step 5: Solve for x
    x = 11,568,229.18/3,911.50
  6. Step 6: Final answer
    x = 2,957.49

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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.