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Finding the Fourth Proportional to 18,706.86, 28,067.99 and 13,734.62

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Solution

The fourth proportional to 18,706.86, 28,067.99 and 13,734.62 is: 20,607.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.86 : 28,067.99 = 13,734.62 : x
  2. Step 2: Convert to fraction form
    18,706.86/28,067.99 = 13,734.62/x
  3. Step 3: Cross multiply
    18,706.86x = 28,067.99 × 13,734.62
  4. Step 4: Simplify right side
    18,706.86x = 385,503,230.94
  5. Step 5: Solve for x
    x = 385,503,230.94/18,706.86
  6. Step 6: Final answer
    x = 20,607.59

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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.