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Finding the Fourth Proportional to 11,891.07, 17,836.61 and 3,571.07

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Solution

The fourth proportional to 11,891.07, 17,836.61 and 3,571.07 is: 5,356.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,891.07 : 17,836.61 = 3,571.07 : x
  2. Step 2: Convert to fraction form
    11,891.07/17,836.61 = 3,571.07/x
  3. Step 3: Cross multiply
    11,891.07x = 17,836.61 × 3,571.07
  4. Step 4: Simplify right side
    11,891.07x = 63,695,675.83
  5. Step 5: Solve for x
    x = 63,695,675.83/11,891.07
  6. Step 6: Final answer
    x = 5,356.60

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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.