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Finding the Fourth Proportional to 7,998.89, 11,998.94 and 2,155.55

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Solution

The fourth proportional to 7,998.89, 11,998.94 and 2,155.55 is: 3,233.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,998.89 : 11,998.94 = 2,155.55 : x
  2. Step 2: Convert to fraction form
    7,998.89/11,998.94 = 2,155.55/x
  3. Step 3: Cross multiply
    7,998.89x = 11,998.94 × 2,155.55
  4. Step 4: Simplify right side
    7,998.89x = 25,864,244.34
  5. Step 5: Solve for x
    x = 25,864,244.34/7,998.89
  6. Step 6: Final answer
    x = 3,233.48

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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.