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Finding the Fourth Proportional to 11,879.78, 16,391.10 and 6,845.48

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Solution

The fourth proportional to 11,879.78, 16,391.10 and 6,845.48 is: 9,445.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,879.78 : 16,391.10 = 6,845.48 : x
  2. Step 2: Convert to fraction form
    11,879.78/16,391.10 = 6,845.48/x
  3. Step 3: Cross multiply
    11,879.78x = 16,391.10 × 6,845.48
  4. Step 4: Simplify right side
    11,879.78x = 112,204,947.23
  5. Step 5: Solve for x
    x = 112,204,947.23/11,879.78
  6. Step 6: Final answer
    x = 9,445.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.