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Finding the Fourth Proportional to 13,818.44, 20,736.32 and 5,610.44

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Solution

The fourth proportional to 13,818.44, 20,736.32 and 5,610.44 is: 8,419.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,818.44 : 20,736.32 = 5,610.44 : x
  2. Step 2: Convert to fraction form
    13,818.44/20,736.32 = 5,610.44/x
  3. Step 3: Cross multiply
    13,818.44x = 20,736.32 × 5,610.44
  4. Step 4: Simplify right side
    13,818.44x = 116,339,879.18
  5. Step 5: Solve for x
    x = 116,339,879.18/13,818.44
  6. Step 6: Final answer
    x = 8,419.18

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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.