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Finding the Fourth Proportional to 11,768.77, 16,240.83 and 6,391.31

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Solution

The fourth proportional to 11,768.77, 16,240.83 and 6,391.31 is: 8,819.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,768.77 : 16,240.83 = 6,391.31 : x
  2. Step 2: Convert to fraction form
    11,768.77/16,240.83 = 6,391.31/x
  3. Step 3: Cross multiply
    11,768.77x = 16,240.83 × 6,391.31
  4. Step 4: Simplify right side
    11,768.77x = 103,800,179.19
  5. Step 5: Solve for x
    x = 103,800,179.19/11,768.77
  6. Step 6: Final answer
    x = 8,819.97

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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.