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Finding the Fourth Proportional to 7,992.89, 11,989.50 and 2,729.11

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Solution

The fourth proportional to 7,992.89, 11,989.50 and 2,729.11 is: 4,093.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,992.89 : 11,989.50 = 2,729.11 : x
  2. Step 2: Convert to fraction form
    7,992.89/11,989.50 = 2,729.11/x
  3. Step 3: Cross multiply
    7,992.89x = 11,989.50 × 2,729.11
  4. Step 4: Simplify right side
    7,992.89x = 32,720,590.75
  5. Step 5: Solve for x
    x = 32,720,590.75/7,992.89
  6. Step 6: Final answer
    x = 4,093.71

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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.