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Finding the Fourth Proportional to 11,771.80, 16,244.05 and 6,991.39

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Solution

The fourth proportional to 11,771.80, 16,244.05 and 6,991.39 is: 9,647.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,771.80 : 16,244.05 = 6,991.39 : x
  2. Step 2: Convert to fraction form
    11,771.80/16,244.05 = 6,991.39/x
  3. Step 3: Cross multiply
    11,771.80x = 16,244.05 × 6,991.39
  4. Step 4: Simplify right side
    11,771.80x = 113,568,488.73
  5. Step 5: Solve for x
    x = 113,568,488.73/11,771.80
  6. Step 6: Final answer
    x = 9,647.50

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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.