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Finding the Fourth Proportional to 11,990.96, 17,984.28 and 3,668.96

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Solution

The fourth proportional to 11,990.96, 17,984.28 and 3,668.96 is: 5,502.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,990.96 : 17,984.28 = 3,668.96 : x
  2. Step 2: Convert to fraction form
    11,990.96/17,984.28 = 3,668.96/x
  3. Step 3: Cross multiply
    11,990.96x = 17,984.28 × 3,668.96
  4. Step 4: Simplify right side
    11,990.96x = 65,983,603.95
  5. Step 5: Solve for x
    x = 65,983,603.95/11,990.96
  6. Step 6: Final answer
    x = 5,502.78

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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.