Home / 12,190.88-18,286.32-4,399.70

Finding the Fourth Proportional to 12,190.88, 18,286.32 and 4,399.70

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Solution

The fourth proportional to 12,190.88, 18,286.32 and 4,399.70 is: 6,599.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.88 : 18,286.32 = 4,399.70 : x
  2. Step 2: Convert to fraction form
    12,190.88/18,286.32 = 4,399.70/x
  3. Step 3: Cross multiply
    12,190.88x = 18,286.32 × 4,399.70
  4. Step 4: Simplify right side
    12,190.88x = 80,454,322.10
  5. Step 5: Solve for x
    x = 80,454,322.10/12,190.88
  6. Step 6: Final answer
    x = 6,599.55

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.