Home / 3,911.92-5,398.45-2,143.69

Finding the Fourth Proportional to 3,911.92, 5,398.45 and 2,143.69

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Solution

The fourth proportional to 3,911.92, 5,398.45 and 2,143.69 is: 2,958.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.92 : 5,398.45 = 2,143.69 : x
  2. Step 2: Convert to fraction form
    3,911.92/5,398.45 = 2,143.69/x
  3. Step 3: Cross multiply
    3,911.92x = 5,398.45 × 2,143.69
  4. Step 4: Simplify right side
    3,911.92x = 11,572,584.43
  5. Step 5: Solve for x
    x = 11,572,584.43/3,911.92
  6. Step 6: Final answer
    x = 2,958.29

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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.