Home / 5,422.39-8,128.12-4,121.13

Finding the Fourth Proportional to 5,422.39, 8,128.12 and 4,121.13

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Solution

The fourth proportional to 5,422.39, 8,128.12 and 4,121.13 is: 6,177.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,422.39 : 8,128.12 = 4,121.13 : x
  2. Step 2: Convert to fraction form
    5,422.39/8,128.12 = 4,121.13/x
  3. Step 3: Cross multiply
    5,422.39x = 8,128.12 × 4,121.13
  4. Step 4: Simplify right side
    5,422.39x = 33,496,988.23
  5. Step 5: Solve for x
    x = 33,496,988.23/5,422.39
  6. Step 6: Final answer
    x = 6,177.53

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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.