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Finding the Fourth Proportional to 9,911.62, 13,692.27 and 7,919.56

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Solution

The fourth proportional to 9,911.62, 13,692.27 and 7,919.56 is: 10,940.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,911.62 : 13,692.27 = 7,919.56 : x
  2. Step 2: Convert to fraction form
    9,911.62/13,692.27 = 7,919.56/x
  3. Step 3: Cross multiply
    9,911.62x = 13,692.27 × 7,919.56
  4. Step 4: Simplify right side
    9,911.62x = 108,436,753.80
  5. Step 5: Solve for x
    x = 108,436,753.80/9,911.62
  6. Step 6: Final answer
    x = 10,940.37

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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.