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Finding the Fourth Proportional to 7,991.87, 11,976.85 and 5,072.22

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Solution

The fourth proportional to 7,991.87, 11,976.85 and 5,072.22 is: 7,601.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.87 : 11,976.85 = 5,072.22 : x
  2. Step 2: Convert to fraction form
    7,991.87/11,976.85 = 5,072.22/x
  3. Step 3: Cross multiply
    7,991.87x = 11,976.85 × 5,072.22
  4. Step 4: Simplify right side
    7,991.87x = 60,749,192.75
  5. Step 5: Solve for x
    x = 60,749,192.75/7,991.87
  6. Step 6: Final answer
    x = 7,601.38

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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.