Home / 7,921.12-11,879.28-4,170.86

Finding the Fourth Proportional to 7,921.12, 11,879.28 and 4,170.86

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Solution

The fourth proportional to 7,921.12, 11,879.28 and 4,170.86 is: 6,255.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.12 : 11,879.28 = 4,170.86 : x
  2. Step 2: Convert to fraction form
    7,921.12/11,879.28 = 4,170.86/x
  3. Step 3: Cross multiply
    7,921.12x = 11,879.28 × 4,170.86
  4. Step 4: Simplify right side
    7,921.12x = 49,546,813.78
  5. Step 5: Solve for x
    x = 49,546,813.78/7,921.12
  6. Step 6: Final answer
    x = 6,255.03

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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.