Home / 5,128.11-7,074.90-3,239.91

Finding the Fourth Proportional to 5,128.11, 7,074.90 and 3,239.91

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Solution

The fourth proportional to 5,128.11, 7,074.90 and 3,239.91 is: 4,469.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.11 : 7,074.90 = 3,239.91 : x
  2. Step 2: Convert to fraction form
    5,128.11/7,074.90 = 3,239.91/x
  3. Step 3: Cross multiply
    5,128.11x = 7,074.90 × 3,239.91
  4. Step 4: Simplify right side
    5,128.11x = 22,922,039.26
  5. Step 5: Solve for x
    x = 22,922,039.26/5,128.11
  6. Step 6: Final answer
    x = 4,469.88

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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.