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Finding the Fourth Proportional to 9,919.95, 14,879.91 and 4,072.44

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Solution

The fourth proportional to 9,919.95, 14,879.91 and 4,072.44 is: 6,108.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,919.95 : 14,879.91 = 4,072.44 : x
  2. Step 2: Convert to fraction form
    9,919.95/14,879.91 = 4,072.44/x
  3. Step 3: Cross multiply
    9,919.95x = 14,879.91 × 4,072.44
  4. Step 4: Simplify right side
    9,919.95x = 60,597,540.68
  5. Step 5: Solve for x
    x = 60,597,540.68/9,919.95
  6. Step 6: Final answer
    x = 6,108.65

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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.