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Finding the Fourth Proportional to 7,211.86, 9,951.96 and 4,067.86

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Solution

The fourth proportional to 7,211.86, 9,951.96 and 4,067.86 is: 5,613.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,211.86 : 9,951.96 = 4,067.86 : x
  2. Step 2: Convert to fraction form
    7,211.86/9,951.96 = 4,067.86/x
  3. Step 3: Cross multiply
    7,211.86x = 9,951.96 × 4,067.86
  4. Step 4: Simplify right side
    7,211.86x = 40,483,180.01
  5. Step 5: Solve for x
    x = 40,483,180.01/7,211.86
  6. Step 6: Final answer
    x = 5,613.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.