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Finding the Fourth Proportional to 11,906.81, 17,860.65 and 4,511.81

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Solution

The fourth proportional to 11,906.81, 17,860.65 and 4,511.81 is: 6,767.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,906.81 : 17,860.65 = 4,511.81 : x
  2. Step 2: Convert to fraction form
    11,906.81/17,860.65 = 4,511.81/x
  3. Step 3: Cross multiply
    11,906.81x = 17,860.65 × 4,511.81
  4. Step 4: Simplify right side
    11,906.81x = 80,583,859.28
  5. Step 5: Solve for x
    x = 80,583,859.28/11,906.81
  6. Step 6: Final answer
    x = 6,767.88

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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.