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Finding the Fourth Proportional to 18,618.60, 27,911.30 and 6,923.82

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Solution

The fourth proportional to 18,618.60, 27,911.30 and 6,923.82 is: 10,379.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,618.60 : 27,911.30 = 6,923.82 : x
  2. Step 2: Convert to fraction form
    18,618.60/27,911.30 = 6,923.82/x
  3. Step 3: Cross multiply
    18,618.60x = 27,911.30 × 6,923.82
  4. Step 4: Simplify right side
    18,618.60x = 193,252,782.55
  5. Step 5: Solve for x
    x = 193,252,782.55/18,618.60
  6. Step 6: Final answer
    x = 10,379.55

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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.