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Finding the Fourth Proportional to 11,999.91, 18,000.13 and 3,679.74

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Solution

The fourth proportional to 11,999.91, 18,000.13 and 3,679.74 is: 5,519.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,999.91 : 18,000.13 = 3,679.74 : x
  2. Step 2: Convert to fraction form
    11,999.91/18,000.13 = 3,679.74/x
  3. Step 3: Cross multiply
    11,999.91x = 18,000.13 × 3,679.74
  4. Step 4: Simplify right side
    11,999.91x = 66,235,824.97
  5. Step 5: Solve for x
    x = 66,235,824.97/11,999.91
  6. Step 6: Final answer
    x = 5,519.69

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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.