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Finding the Fourth Proportional to 7,998.41, 11,997.89 and 2,155.16

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Solution

The fourth proportional to 7,998.41, 11,997.89 and 2,155.16 is: 3,232.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,998.41 : 11,997.89 = 2,155.16 : x
  2. Step 2: Convert to fraction form
    7,998.41/11,997.89 = 2,155.16/x
  3. Step 3: Cross multiply
    7,998.41x = 11,997.89 × 2,155.16
  4. Step 4: Simplify right side
    7,998.41x = 25,857,372.61
  5. Step 5: Solve for x
    x = 25,857,372.61/7,998.41
  6. Step 6: Final answer
    x = 3,232.81

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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.