Home / 13,765.85-20,644.72-3,905.99

Finding the Fourth Proportional to 13,765.85, 20,644.72 and 3,905.99

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Solution

The fourth proportional to 13,765.85, 20,644.72 and 3,905.99 is: 5,857.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,765.85 : 20,644.72 = 3,905.99 : x
  2. Step 2: Convert to fraction form
    13,765.85/20,644.72 = 3,905.99/x
  3. Step 3: Cross multiply
    13,765.85x = 20,644.72 × 3,905.99
  4. Step 4: Simplify right side
    13,765.85x = 80,638,069.87
  5. Step 5: Solve for x
    x = 80,638,069.87/13,765.85
  6. Step 6: Final answer
    x = 5,857.83

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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.