Home / 3,911.76-5,398.38-2,143.33

Finding the Fourth Proportional to 3,911.76, 5,398.38 and 2,143.33

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Solution

The fourth proportional to 3,911.76, 5,398.38 and 2,143.33 is: 2,957.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.76 : 5,398.38 = 2,143.33 : x
  2. Step 2: Convert to fraction form
    3,911.76/5,398.38 = 2,143.33/x
  3. Step 3: Cross multiply
    3,911.76x = 5,398.38 × 2,143.33
  4. Step 4: Simplify right side
    3,911.76x = 11,570,496.31
  5. Step 5: Solve for x
    x = 11,570,496.31/3,911.76
  6. Step 6: Final answer
    x = 2,957.87

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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.