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Finding the Fourth Proportional to 11,988.98, 17,982.81 and 3,668.99

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Solution

The fourth proportional to 11,988.98, 17,982.81 and 3,668.99 is: 5,503.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,988.98 : 17,982.81 = 3,668.99 : x
  2. Step 2: Convert to fraction form
    11,988.98/17,982.81 = 3,668.99/x
  3. Step 3: Cross multiply
    11,988.98x = 17,982.81 × 3,668.99
  4. Step 4: Simplify right side
    11,988.98x = 65,978,808.78
  5. Step 5: Solve for x
    x = 65,978,808.78/11,988.98
  6. Step 6: Final answer
    x = 5,503.29

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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.