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Finding the Fourth Proportional to 7,992.80, 11,994.60 and 5,212.70

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Solution

The fourth proportional to 7,992.80, 11,994.60 and 5,212.70 is: 7,822.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,992.80 : 11,994.60 = 5,212.70 : x
  2. Step 2: Convert to fraction form
    7,992.80/11,994.60 = 5,212.70/x
  3. Step 3: Cross multiply
    7,992.80x = 11,994.60 × 5,212.70
  4. Step 4: Simplify right side
    7,992.80x = 62,524,251.42
  5. Step 5: Solve for x
    x = 62,524,251.42/7,992.80
  6. Step 6: Final answer
    x = 7,822.57

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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.