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Finding the Fourth Proportional to 7,998.82, 11,998.96 and 2,155.30

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Solution

The fourth proportional to 7,998.82, 11,998.96 and 2,155.30 is: 3,233.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,998.82 : 11,998.96 = 2,155.30 : x
  2. Step 2: Convert to fraction form
    7,998.82/11,998.96 = 2,155.30/x
  3. Step 3: Cross multiply
    7,998.82x = 11,998.96 × 2,155.30
  4. Step 4: Simplify right side
    7,998.82x = 25,861,358.49
  5. Step 5: Solve for x
    x = 25,861,358.49/7,998.82
  6. Step 6: Final answer
    x = 3,233.15

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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.