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Finding the Fourth Proportional to 27,998.40, 41,997.60 and 7,221.90

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Solution

The fourth proportional to 27,998.40, 41,997.60 and 7,221.90 is: 10,832.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,998.40 : 41,997.60 = 7,221.90 : x
  2. Step 2: Convert to fraction form
    27,998.40/41,997.60 = 7,221.90/x
  3. Step 3: Cross multiply
    27,998.40x = 41,997.60 × 7,221.90
  4. Step 4: Simplify right side
    27,998.40x = 303,302,467.44
  5. Step 5: Solve for x
    x = 303,302,467.44/27,998.40
  6. Step 6: Final answer
    x = 10,832.85

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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.