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Finding the Fourth Proportional to 11,999.88, 17,999.82 and 3,679.92

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Solution

The fourth proportional to 11,999.88, 17,999.82 and 3,679.92 is: 5,519.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,999.88 : 17,999.82 = 3,679.92 : x
  2. Step 2: Convert to fraction form
    11,999.88/17,999.82 = 3,679.92/x
  3. Step 3: Cross multiply
    11,999.88x = 17,999.82 × 3,679.92
  4. Step 4: Simplify right side
    11,999.88x = 66,237,897.61
  5. Step 5: Solve for x
    x = 66,237,897.61/11,999.88
  6. Step 6: Final answer
    x = 5,519.88

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1.5x scale

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.