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Finding the Fourth Proportional to 11,879.57, 17,825.56 and 8,619.57

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Solution

The fourth proportional to 11,879.57, 17,825.56 and 8,619.57 is: 12,933.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,879.57 : 17,825.56 = 8,619.57 : x
  2. Step 2: Convert to fraction form
    11,879.57/17,825.56 = 8,619.57/x
  3. Step 3: Cross multiply
    11,879.57x = 17,825.56 × 8,619.57
  4. Step 4: Simplify right side
    11,879.57x = 153,648,640.66
  5. Step 5: Solve for x
    x = 153,648,640.66/11,879.57
  6. Step 6: Final answer
    x = 12,933.85

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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.