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Finding the Fourth Proportional to 7,919.16, 11,879.64 and 2,372.82

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Solution

The fourth proportional to 7,919.16, 11,879.64 and 2,372.82 is: 3,559.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.16 : 11,879.64 = 2,372.82 : x
  2. Step 2: Convert to fraction form
    7,919.16/11,879.64 = 2,372.82/x
  3. Step 3: Cross multiply
    7,919.16x = 11,879.64 × 2,372.82
  4. Step 4: Simplify right side
    7,919.16x = 28,188,247.38
  5. Step 5: Solve for x
    x = 28,188,247.38/7,919.16
  6. Step 6: Final answer
    x = 3,559.50

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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.