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Finding the Fourth Proportional to 18,238.75, 27,358.40 and 5,091.19

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Solution

The fourth proportional to 18,238.75, 27,358.40 and 5,091.19 is: 7,636.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,238.75 : 27,358.40 = 5,091.19 : x
  2. Step 2: Convert to fraction form
    18,238.75/27,358.40 = 5,091.19/x
  3. Step 3: Cross multiply
    18,238.75x = 27,358.40 × 5,091.19
  4. Step 4: Simplify right side
    18,238.75x = 139,286,718.64
  5. Step 5: Solve for x
    x = 139,286,718.64/18,238.75
  6. Step 6: Final answer
    x = 7,636.86

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.