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Finding the Fourth Proportional to 11,662.80, 16,081.97 and 7,879.41

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Solution

The fourth proportional to 11,662.80, 16,081.97 and 7,879.41 is: 10,865.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,662.80 : 16,081.97 = 7,879.41 : x
  2. Step 2: Convert to fraction form
    11,662.80/16,081.97 = 7,879.41/x
  3. Step 3: Cross multiply
    11,662.80x = 16,081.97 × 7,879.41
  4. Step 4: Simplify right side
    11,662.80x = 126,716,395.84
  5. Step 5: Solve for x
    x = 126,716,395.84/11,662.80
  6. Step 6: Final answer
    x = 10,865.01

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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.