Home / 13,789.49-20,684.31-3,928.85

Finding the Fourth Proportional to 13,789.49, 20,684.31 and 3,928.85

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Solution

The fourth proportional to 13,789.49, 20,684.31 and 3,928.85 is: 5,893.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,789.49 : 20,684.31 = 3,928.85 : x
  2. Step 2: Convert to fraction form
    13,789.49/20,684.31 = 3,928.85/x
  3. Step 3: Cross multiply
    13,789.49x = 20,684.31 × 3,928.85
  4. Step 4: Simplify right side
    13,789.49x = 81,265,649.20
  5. Step 5: Solve for x
    x = 81,265,649.20/13,789.49
  6. Step 6: Final answer
    x = 5,893.30

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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.