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Finding the Fourth Proportional to 18,105.21, 27,157.41 and 8,247.11

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Solution

The fourth proportional to 18,105.21, 27,157.41 and 8,247.11 is: 12,370.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,105.21 : 27,157.41 = 8,247.11 : x
  2. Step 2: Convert to fraction form
    18,105.21/27,157.41 = 8,247.11/x
  3. Step 3: Cross multiply
    18,105.21x = 27,157.41 × 8,247.11
  4. Step 4: Simplify right side
    18,105.21x = 223,970,011.80
  5. Step 5: Solve for x
    x = 223,970,011.80/18,105.21
  6. Step 6: Final answer
    x = 12,370.47

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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.