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Finding the Fourth Proportional to 18,622.23, 27,939.02 and 5,474.72

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Solution

The fourth proportional to 18,622.23, 27,939.02 and 5,474.72 is: 8,213.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,622.23 : 27,939.02 = 5,474.72 : x
  2. Step 2: Convert to fraction form
    18,622.23/27,939.02 = 5,474.72/x
  3. Step 3: Cross multiply
    18,622.23x = 27,939.02 × 5,474.72
  4. Step 4: Simplify right side
    18,622.23x = 152,958,144.51
  5. Step 5: Solve for x
    x = 152,958,144.51/18,622.23
  6. Step 6: Final answer
    x = 8,213.74

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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.