Home / 20,190.11-30,286.19-7,711.23

Finding the Fourth Proportional to 20,190.11, 30,286.19 and 7,711.23

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Solution

The fourth proportional to 20,190.11, 30,286.19 and 7,711.23 is: 11,567.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.11 : 30,286.19 = 7,711.23 : x
  2. Step 2: Convert to fraction form
    20,190.11/30,286.19 = 7,711.23/x
  3. Step 3: Cross multiply
    20,190.11x = 30,286.19 × 7,711.23
  4. Step 4: Simplify right side
    20,190.11x = 233,543,643.38
  5. Step 5: Solve for x
    x = 233,543,643.38/20,190.11
  6. Step 6: Final answer
    x = 11,567.23

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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.