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Finding the Fourth Proportional to 18,638.77, 27,948.51 and 5,489.44

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Solution

The fourth proportional to 18,638.77, 27,948.51 and 5,489.44 is: 8,231.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638.77 : 27,948.51 = 5,489.44 : x
  2. Step 2: Convert to fraction form
    18,638.77/27,948.51 = 5,489.44/x
  3. Step 3: Cross multiply
    18,638.77x = 27,948.51 × 5,489.44
  4. Step 4: Simplify right side
    18,638.77x = 153,421,668.73
  5. Step 5: Solve for x
    x = 153,421,668.73/18,638.77
  6. Step 6: Final answer
    x = 8,231.32

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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.