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Finding the Fourth Proportional to 18,923, 28,384.62 and 6,611

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Solution

The fourth proportional to 18,923, 28,384.62 and 6,611 is: 9,916.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,923 : 28,384.62 = 6,611 : x
  2. Step 2: Convert to fraction form
    18,923/28,384.62 = 6,611/x
  3. Step 3: Cross multiply
    18,923x = 28,384.62 × 6,611
  4. Step 4: Simplify right side
    18,923x = 187,650,722.82
  5. Step 5: Solve for x
    x = 187,650,722.82/18,923
  6. Step 6: Final answer
    x = 9,916.54

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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.