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Finding the Fourth Proportional to 11,919.99, 17,879.15 and 3,154.71

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Solution

The fourth proportional to 11,919.99, 17,879.15 and 3,154.71 is: 4,731.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,919.99 : 17,879.15 = 3,154.71 : x
  2. Step 2: Convert to fraction form
    11,919.99/17,879.15 = 3,154.71/x
  3. Step 3: Cross multiply
    11,919.99x = 17,879.15 × 3,154.71
  4. Step 4: Simplify right side
    11,919.99x = 56,403,517.52
  5. Step 5: Solve for x
    x = 56,403,517.52/11,919.99
  6. Step 6: Final answer
    x = 4,731.84

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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.