Home / 13,679.70-20,511.33-5,349.78

Finding the Fourth Proportional to 13,679.70, 20,511.33 and 5,349.78

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Solution

The fourth proportional to 13,679.70, 20,511.33 and 5,349.78 is: 8,021.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.70 : 20,511.33 = 5,349.78 : x
  2. Step 2: Convert to fraction form
    13,679.70/20,511.33 = 5,349.78/x
  3. Step 3: Cross multiply
    13,679.70x = 20,511.33 × 5,349.78
  4. Step 4: Simplify right side
    13,679.70x = 109,731,103.01
  5. Step 5: Solve for x
    x = 109,731,103.01/13,679.70
  6. Step 6: Final answer
    x = 8,021.46

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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.