Home / 5,412.26-8,115.12-2,121.44

Finding the Fourth Proportional to 5,412.26, 8,115.12 and 2,121.44

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Solution

The fourth proportional to 5,412.26, 8,115.12 and 2,121.44 is: 3,180.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,412.26 : 8,115.12 = 2,121.44 : x
  2. Step 2: Convert to fraction form
    5,412.26/8,115.12 = 2,121.44/x
  3. Step 3: Cross multiply
    5,412.26x = 8,115.12 × 2,121.44
  4. Step 4: Simplify right side
    5,412.26x = 17,215,740.17
  5. Step 5: Solve for x
    x = 17,215,740.17/5,412.26
  6. Step 6: Final answer
    x = 3,180.88

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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.