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Finding the Fourth Proportional to 11,379.99, 17,059.19 and 3,979.63

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Solution

The fourth proportional to 11,379.99, 17,059.19 and 3,979.63 is: 5,965.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,379.99 : 17,059.19 = 3,979.63 : x
  2. Step 2: Convert to fraction form
    11,379.99/17,059.19 = 3,979.63/x
  3. Step 3: Cross multiply
    11,379.99x = 17,059.19 × 3,979.63
  4. Step 4: Simplify right side
    11,379.99x = 67,889,201.75
  5. Step 5: Solve for x
    x = 67,889,201.75/11,379.99
  6. Step 6: Final answer
    x = 5,965.66

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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.