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Finding the Fourth Proportional to 18,000.82, 27,000.21 and 5,520.81

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Solution

The fourth proportional to 18,000.82, 27,000.21 and 5,520.81 is: 8,280.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,000.82 : 27,000.21 = 5,520.81 : x
  2. Step 2: Convert to fraction form
    18,000.82/27,000.21 = 5,520.81/x
  3. Step 3: Cross multiply
    18,000.82x = 27,000.21 × 5,520.81
  4. Step 4: Simplify right side
    18,000.82x = 149,062,894.37
  5. Step 5: Solve for x
    x = 149,062,894.37/18,000.82
  6. Step 6: Final answer
    x = 8,280.90

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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.