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Finding the Fourth Proportional to 7,942.26, 11,920.53 and 4,247.65

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Solution

The fourth proportional to 7,942.26, 11,920.53 and 4,247.65 is: 6,375.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,942.26 : 11,920.53 = 4,247.65 : x
  2. Step 2: Convert to fraction form
    7,942.26/11,920.53 = 4,247.65/x
  3. Step 3: Cross multiply
    7,942.26x = 11,920.53 × 4,247.65
  4. Step 4: Simplify right side
    7,942.26x = 50,634,239.25
  5. Step 5: Solve for x
    x = 50,634,239.25/7,942.26
  6. Step 6: Final answer
    x = 6,375.29

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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.