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Finding the Fourth Proportional to 18,123.20, 27,183.48 and 4,974.44

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Solution

The fourth proportional to 18,123.20, 27,183.48 and 4,974.44 is: 7,461.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,123.20 : 27,183.48 = 4,974.44 : x
  2. Step 2: Convert to fraction form
    18,123.20/27,183.48 = 4,974.44/x
  3. Step 3: Cross multiply
    18,123.20x = 27,183.48 × 4,974.44
  4. Step 4: Simplify right side
    18,123.20x = 135,222,590.25
  5. Step 5: Solve for x
    x = 135,222,590.25/18,123.20
  6. Step 6: Final answer
    x = 7,461.30

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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.