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Finding the Fourth Proportional to 11,891.91, 17,836.52 and 3,127.52

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Solution

The fourth proportional to 11,891.91, 17,836.52 and 3,127.52 is: 4,690.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,891.91 : 17,836.52 = 3,127.52 : x
  2. Step 2: Convert to fraction form
    11,891.91/17,836.52 = 3,127.52/x
  3. Step 3: Cross multiply
    11,891.91x = 17,836.52 × 3,127.52
  4. Step 4: Simplify right side
    11,891.91x = 55,783,968.21
  5. Step 5: Solve for x
    x = 55,783,968.21/11,891.91
  6. Step 6: Final answer
    x = 4,690.92

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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.