Home / 13,838.21-20,757.25-5,405.57

Finding the Fourth Proportional to 13,838.21, 20,757.25 and 5,405.57

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Solution

The fourth proportional to 13,838.21, 20,757.25 and 5,405.57 is: 8,108.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,838.21 : 20,757.25 = 5,405.57 : x
  2. Step 2: Convert to fraction form
    13,838.21/20,757.25 = 5,405.57/x
  3. Step 3: Cross multiply
    13,838.21x = 20,757.25 × 5,405.57
  4. Step 4: Simplify right side
    13,838.21x = 112,204,767.88
  5. Step 5: Solve for x
    x = 112,204,767.88/13,838.21
  6. Step 6: Final answer
    x = 8,108.33

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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.