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Finding the Fourth Proportional to 18,583.72, 27,872.22 and 7,489.96

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Solution

The fourth proportional to 18,583.72, 27,872.22 and 7,489.96 is: 11,233.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,583.72 : 27,872.22 = 7,489.96 : x
  2. Step 2: Convert to fraction form
    18,583.72/27,872.22 = 7,489.96/x
  3. Step 3: Cross multiply
    18,583.72x = 27,872.22 × 7,489.96
  4. Step 4: Simplify right side
    18,583.72x = 208,761,812.91
  5. Step 5: Solve for x
    x = 208,761,812.91/18,583.72
  6. Step 6: Final answer
    x = 11,233.59

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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.