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Finding the Fourth Proportional to 7,991.22, 11,986.94 and 3,061.11

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Solution

The fourth proportional to 7,991.22, 11,986.94 and 3,061.11 is: 4,591.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.22 : 11,986.94 = 3,061.11 : x
  2. Step 2: Convert to fraction form
    7,991.22/11,986.94 = 3,061.11/x
  3. Step 3: Cross multiply
    7,991.22x = 11,986.94 × 3,061.11
  4. Step 4: Simplify right side
    7,991.22x = 36,693,349.56
  5. Step 5: Solve for x
    x = 36,693,349.56/7,991.22
  6. Step 6: Final answer
    x = 4,591.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.