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Finding the Fourth Proportional to 11,879.00, 17,818.50 and 3,113.91

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Solution

The fourth proportional to 11,879.00, 17,818.50 and 3,113.91 is: 4,670.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,879.00 : 17,818.50 = 3,113.91 : x
  2. Step 2: Convert to fraction form
    11,879.00/17,818.50 = 3,113.91/x
  3. Step 3: Cross multiply
    11,879.00x = 17,818.50 × 3,113.91
  4. Step 4: Simplify right side
    11,879.00x = 55,485,233.80
  5. Step 5: Solve for x
    x = 55,485,233.80/11,879.00
  6. Step 6: Final answer
    x = 4,670.87

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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.