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Finding the Fourth Proportional to 8,976.96, 12,388.68 and 5,439.96

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Solution

The fourth proportional to 8,976.96, 12,388.68 and 5,439.96 is: 7,507.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,976.96 : 12,388.68 = 5,439.96 : x
  2. Step 2: Convert to fraction form
    8,976.96/12,388.68 = 5,439.96/x
  3. Step 3: Cross multiply
    8,976.96x = 12,388.68 × 5,439.96
  4. Step 4: Simplify right side
    8,976.96x = 67,393,923.65
  5. Step 5: Solve for x
    x = 67,393,923.65/8,976.96
  6. Step 6: Final answer
    x = 7,507.43

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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.