Home / 3,928.91-5,422.22-2,160.86

Finding the Fourth Proportional to 3,928.91, 5,422.22 and 2,160.86

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Solution

The fourth proportional to 3,928.91, 5,422.22 and 2,160.86 is: 2,982.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.91 : 5,422.22 = 2,160.86 : x
  2. Step 2: Convert to fraction form
    3,928.91/5,422.22 = 2,160.86/x
  3. Step 3: Cross multiply
    3,928.91x = 5,422.22 × 2,160.86
  4. Step 4: Simplify right side
    3,928.91x = 11,716,658.31
  5. Step 5: Solve for x
    x = 11,716,658.31/3,928.91
  6. Step 6: Final answer
    x = 2,982.17

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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.