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Finding the Fourth Proportional to 11,879.43, 17,825.34 and 8,619.44

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Solution

The fourth proportional to 11,879.43, 17,825.34 and 8,619.44 is: 12,933.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,879.43 : 17,825.34 = 8,619.44 : x
  2. Step 2: Convert to fraction form
    11,879.43/17,825.34 = 8,619.44/x
  3. Step 3: Cross multiply
    11,879.43x = 17,825.34 × 8,619.44
  4. Step 4: Simplify right side
    11,879.43x = 153,644,417.70
  5. Step 5: Solve for x
    x = 153,644,417.70/11,879.43
  6. Step 6: Final answer
    x = 12,933.65

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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.