Home / 13,791.60-20,687.68-3,403.44

Finding the Fourth Proportional to 13,791.60, 20,687.68 and 3,403.44

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Solution

The fourth proportional to 13,791.60, 20,687.68 and 3,403.44 is: 5,105.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.60 : 20,687.68 = 3,403.44 : x
  2. Step 2: Convert to fraction form
    13,791.60/20,687.68 = 3,403.44/x
  3. Step 3: Cross multiply
    13,791.60x = 20,687.68 × 3,403.44
  4. Step 4: Simplify right side
    13,791.60x = 70,409,277.62
  5. Step 5: Solve for x
    x = 70,409,277.62/13,791.60
  6. Step 6: Final answer
    x = 5,105.23

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1.5x scale

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.