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Finding the Fourth Proportional to 27,879.80, 41,787.30 and 11,231.60

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Solution

The fourth proportional to 27,879.80, 41,787.30 and 11,231.60 is: 16,834.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,879.80 : 41,787.30 = 11,231.60 : x
  2. Step 2: Convert to fraction form
    27,879.80/41,787.30 = 11,231.60/x
  3. Step 3: Cross multiply
    27,879.80x = 41,787.30 × 11,231.60
  4. Step 4: Simplify right side
    27,879.80x = 469,338,238.68
  5. Step 5: Solve for x
    x = 469,338,238.68/27,879.80
  6. Step 6: Final answer
    x = 16,834.35

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1.5x scale

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.