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Finding the Fourth Proportional to 6,975, 9,626.74 and 3,990.96

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Solution

The fourth proportional to 6,975, 9,626.74 and 3,990.96 is: 5,508.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,975 : 9,626.74 = 3,990.96 : x
  2. Step 2: Convert to fraction form
    6,975/9,626.74 = 3,990.96/x
  3. Step 3: Cross multiply
    6,975x = 9,626.74 × 3,990.96
  4. Step 4: Simplify right side
    6,975x = 38,419,934.27
  5. Step 5: Solve for x
    x = 38,419,934.27/6,975
  6. Step 6: Final answer
    x = 5,508.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.