Home / 8,128.56-12,190.74-3,198.23

Finding the Fourth Proportional to 8,128.56, 12,190.74 and 3,198.23

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Solution

The fourth proportional to 8,128.56, 12,190.74 and 3,198.23 is: 4,796.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.56 : 12,190.74 = 3,198.23 : x
  2. Step 2: Convert to fraction form
    8,128.56/12,190.74 = 3,198.23/x
  3. Step 3: Cross multiply
    8,128.56x = 12,190.74 × 3,198.23
  4. Step 4: Simplify right side
    8,128.56x = 38,988,729.44
  5. Step 5: Solve for x
    x = 38,988,729.44/8,128.56
  6. Step 6: Final answer
    x = 4,796.51

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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.