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Finding the Fourth Proportional to 13,889.42, 20,834.16 and 3,359.42

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Solution

The fourth proportional to 13,889.42, 20,834.16 and 3,359.42 is: 5,039.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,889.42 : 20,834.16 = 3,359.42 : x
  2. Step 2: Convert to fraction form
    13,889.42/20,834.16 = 3,359.42/x
  3. Step 3: Cross multiply
    13,889.42x = 20,834.16 × 3,359.42
  4. Step 4: Simplify right side
    13,889.42x = 69,990,589.62
  5. Step 5: Solve for x
    x = 69,990,589.62/13,889.42
  6. Step 6: Final answer
    x = 5,039.13

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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.