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Finding the Fourth Proportional to 27,919.89, 41,879.17 and 6,859.89

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Solution

The fourth proportional to 27,919.89, 41,879.17 and 6,859.89 is: 10,289.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,919.89 : 41,879.17 = 6,859.89 : x
  2. Step 2: Convert to fraction form
    27,919.89/41,879.17 = 6,859.89/x
  3. Step 3: Cross multiply
    27,919.89x = 41,879.17 × 6,859.89
  4. Step 4: Simplify right side
    27,919.89x = 287,286,499.49
  5. Step 5: Solve for x
    x = 287,286,499.49/27,919.89
  6. Step 6: Final answer
    x = 10,289.67

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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.