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Finding the Fourth Proportional to 7,727.89, 11,572.94 and 6,979.09

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Solution

The fourth proportional to 7,727.89, 11,572.94 and 6,979.09 is: 10,451.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,727.89 : 11,572.94 = 6,979.09 : x
  2. Step 2: Convert to fraction form
    7,727.89/11,572.94 = 6,979.09/x
  3. Step 3: Cross multiply
    7,727.89x = 11,572.94 × 6,979.09
  4. Step 4: Simplify right side
    7,727.89x = 80,768,589.82
  5. Step 5: Solve for x
    x = 80,768,589.82/7,727.89
  6. Step 6: Final answer
    x = 10,451.57

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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.