Home / 13,905.72-20,858.39-3,375.81

Finding the Fourth Proportional to 13,905.72, 20,858.39 and 3,375.81

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Solution

The fourth proportional to 13,905.72, 20,858.39 and 3,375.81 is: 5,063.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,905.72 : 20,858.39 = 3,375.81 : x
  2. Step 2: Convert to fraction form
    13,905.72/20,858.39 = 3,375.81/x
  3. Step 3: Cross multiply
    13,905.72x = 20,858.39 × 3,375.81
  4. Step 4: Simplify right side
    13,905.72x = 70,413,961.55
  5. Step 5: Solve for x
    x = 70,413,961.55/13,905.72
  6. Step 6: Final answer
    x = 5,063.67

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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.