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Finding the Fourth Proportional to 18,093.12, 27,138.72 and 5,781.12

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Solution

The fourth proportional to 18,093.12, 27,138.72 and 5,781.12 is: 8,671.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,093.12 : 27,138.72 = 5,781.12 : x
  2. Step 2: Convert to fraction form
    18,093.12/27,138.72 = 5,781.12/x
  3. Step 3: Cross multiply
    18,093.12x = 27,138.72 × 5,781.12
  4. Step 4: Simplify right side
    18,093.12x = 156,892,196.97
  5. Step 5: Solve for x
    x = 156,892,196.97/18,093.12
  6. Step 6: Final answer
    x = 8,671.37

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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.