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Finding the Fourth Proportional to 2,183.12, 3,013 and 2,115.12

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Solution

The fourth proportional to 2,183.12, 3,013 and 2,115.12 is: 2,919.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,183.12 : 3,013 = 2,115.12 : x
  2. Step 2: Convert to fraction form
    2,183.12/3,013 = 2,115.12/x
  3. Step 3: Cross multiply
    2,183.12x = 3,013 × 2,115.12
  4. Step 4: Simplify right side
    2,183.12x = 6,372,856.56
  5. Step 5: Solve for x
    x = 6,372,856.56/2,183.12
  6. Step 6: Final answer
    x = 2,919.15

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Double scale
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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.