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Finding the Fourth Proportional to 18,012.91, 27,020.67 and 6,919.60

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Solution

The fourth proportional to 18,012.91, 27,020.67 and 6,919.60 is: 10,379.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,012.91 : 27,020.67 = 6,919.60 : x
  2. Step 2: Convert to fraction form
    18,012.91/27,020.67 = 6,919.60/x
  3. Step 3: Cross multiply
    18,012.91x = 27,020.67 × 6,919.60
  4. Step 4: Simplify right side
    18,012.91x = 186,972,228.13
  5. Step 5: Solve for x
    x = 186,972,228.13/18,012.91
  6. Step 6: Final answer
    x = 10,379.90

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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.