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Finding the Fourth Proportional to 18,479.70, 27,723.60 and 7,383.60

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Solution

The fourth proportional to 18,479.70, 27,723.60 and 7,383.60 is: 11,077.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,479.70 : 27,723.60 = 7,383.60 : x
  2. Step 2: Convert to fraction form
    18,479.70/27,723.60 = 7,383.60/x
  3. Step 3: Cross multiply
    18,479.70x = 27,723.60 × 7,383.60
  4. Step 4: Simplify right side
    18,479.70x = 204,699,972.96
  5. Step 5: Solve for x
    x = 204,699,972.96/18,479.70
  6. Step 6: Final answer
    x = 11,077.02

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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.