Home / 5,419.22-8,128.11-2,131.43

Finding the Fourth Proportional to 5,419.22, 8,128.11 and 2,131.43

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Solution

The fourth proportional to 5,419.22, 8,128.11 and 2,131.43 is: 3,196.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,419.22 : 8,128.11 = 2,131.43 : x
  2. Step 2: Convert to fraction form
    5,419.22/8,128.11 = 2,131.43/x
  3. Step 3: Cross multiply
    5,419.22x = 8,128.11 × 2,131.43
  4. Step 4: Simplify right side
    5,419.22x = 17,324,497.50
  5. Step 5: Solve for x
    x = 17,324,497.50/5,419.22
  6. Step 6: Final answer
    x = 3,196.86

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.