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Finding the Fourth Proportional to 9,318, 13,979.16 and 3,162

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Solution

The fourth proportional to 9,318, 13,979.16 and 3,162 is: 4,743.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,318 : 13,979.16 = 3,162 : x
  2. Step 2: Convert to fraction form
    9,318/13,979.16 = 3,162/x
  3. Step 3: Cross multiply
    9,318x = 13,979.16 × 3,162
  4. Step 4: Simplify right side
    9,318x = 44,202,103.92
  5. Step 5: Solve for x
    x = 44,202,103.92/9,318
  6. Step 6: Final answer
    x = 4,743.73

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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.