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Finding the Fourth Proportional to 11,999.60, 18,000.10 and 3,679.70

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Solution

The fourth proportional to 11,999.60, 18,000.10 and 3,679.70 is: 5,519.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,999.60 : 18,000.10 = 3,679.70 : x
  2. Step 2: Convert to fraction form
    11,999.60/18,000.10 = 3,679.70/x
  3. Step 3: Cross multiply
    11,999.60x = 18,000.10 × 3,679.70
  4. Step 4: Simplify right side
    11,999.60x = 66,234,868.77
  5. Step 5: Solve for x
    x = 66,234,868.77/11,999.60
  6. Step 6: Final answer
    x = 5,519.76

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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.