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Finding the Fourth Proportional to 18,508.65, 27,764.73 and 5,181.66

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Solution

The fourth proportional to 18,508.65, 27,764.73 and 5,181.66 is: 7,772.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,508.65 : 27,764.73 = 5,181.66 : x
  2. Step 2: Convert to fraction form
    18,508.65/27,764.73 = 5,181.66/x
  3. Step 3: Cross multiply
    18,508.65x = 27,764.73 × 5,181.66
  4. Step 4: Simplify right side
    18,508.65x = 143,867,390.85
  5. Step 5: Solve for x
    x = 143,867,390.85/18,508.65
  6. Step 6: Final answer
    x = 7,772.98

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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.