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Finding the Fourth Proportional to 11,811.42, 17,717.11 and 3,491.54

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Solution

The fourth proportional to 11,811.42, 17,717.11 and 3,491.54 is: 5,237.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,811.42 : 17,717.11 = 3,491.54 : x
  2. Step 2: Convert to fraction form
    11,811.42/17,717.11 = 3,491.54/x
  3. Step 3: Cross multiply
    11,811.42x = 17,717.11 × 3,491.54
  4. Step 4: Simplify right side
    11,811.42x = 61,859,998.25
  5. Step 5: Solve for x
    x = 61,859,998.25/11,811.42
  6. Step 6: Final answer
    x = 5,237.30

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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.