Home / 3,911.76-5,398.20-2,143.35

Finding the Fourth Proportional to 3,911.76, 5,398.20 and 2,143.35

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Solution

The fourth proportional to 3,911.76, 5,398.20 and 2,143.35 is: 2,957.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.76 : 5,398.20 = 2,143.35 : x
  2. Step 2: Convert to fraction form
    3,911.76/5,398.20 = 2,143.35/x
  3. Step 3: Cross multiply
    3,911.76x = 5,398.20 × 2,143.35
  4. Step 4: Simplify right side
    3,911.76x = 11,570,231.97
  5. Step 5: Solve for x
    x = 11,570,231.97/3,911.76
  6. Step 6: Final answer
    x = 2,957.81

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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.