Home / 21,872.23-30,183.66-11,936.23

Finding the Fourth Proportional to 21,872.23, 30,183.66 and 11,936.23

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Solution

The fourth proportional to 21,872.23, 30,183.66 and 11,936.23 is: 16,471.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,872.23 : 30,183.66 = 11,936.23 : x
  2. Step 2: Convert to fraction form
    21,872.23/30,183.66 = 11,936.23/x
  3. Step 3: Cross multiply
    21,872.23x = 30,183.66 × 11,936.23
  4. Step 4: Simplify right side
    21,872.23x = 360,278,986.92
  5. Step 5: Solve for x
    x = 360,278,986.92/21,872.23
  6. Step 6: Final answer
    x = 16,471.99

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Half scale
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Double scale
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Similar ratio
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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.