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Finding the Fourth Proportional to 11,879.19, 17,807.00 and 6,616.61

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Solution

The fourth proportional to 11,879.19, 17,807.00 and 6,616.61 is: 9,918.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,879.19 : 17,807.00 = 6,616.61 : x
  2. Step 2: Convert to fraction form
    11,879.19/17,807.00 = 6,616.61/x
  3. Step 3: Cross multiply
    11,879.19x = 17,807.00 × 6,616.61
  4. Step 4: Simplify right side
    11,879.19x = 117,821,913.21
  5. Step 5: Solve for x
    x = 117,821,913.21/11,879.19
  6. Step 6: Final answer
    x = 9,918.35

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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.