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Finding the Fourth Proportional to 7,914.12, 11,813.18 and 6,979.96

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Solution

The fourth proportional to 7,914.12, 11,813.18 and 6,979.96 is: 10,418.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,914.12 : 11,813.18 = 6,979.96 : x
  2. Step 2: Convert to fraction form
    7,914.12/11,813.18 = 6,979.96/x
  3. Step 3: Cross multiply
    7,914.12x = 11,813.18 × 6,979.96
  4. Step 4: Simplify right side
    7,914.12x = 82,455,523.87
  5. Step 5: Solve for x
    x = 82,455,523.87/7,914.12
  6. Step 6: Final answer
    x = 10,418.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.