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Finding the Fourth Proportional to 11,988.55, 17,984.99 and 3,668.41

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Solution

The fourth proportional to 11,988.55, 17,984.99 and 3,668.41 is: 5,503.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,988.55 : 17,984.99 = 3,668.41 : x
  2. Step 2: Convert to fraction form
    11,988.55/17,984.99 = 3,668.41/x
  3. Step 3: Cross multiply
    11,988.55x = 17,984.99 × 3,668.41
  4. Step 4: Simplify right side
    11,988.55x = 65,976,317.17
  5. Step 5: Solve for x
    x = 65,976,317.17/11,988.55
  6. Step 6: Final answer
    x = 5,503.28

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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.