Home / 13,772.20-20,659.09-3,910.71

Finding the Fourth Proportional to 13,772.20, 20,659.09 and 3,910.71

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Solution

The fourth proportional to 13,772.20, 20,659.09 and 3,910.71 is: 5,866.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,772.20 : 20,659.09 = 3,910.71 : x
  2. Step 2: Convert to fraction form
    13,772.20/20,659.09 = 3,910.71/x
  3. Step 3: Cross multiply
    13,772.20x = 20,659.09 × 3,910.71
  4. Step 4: Simplify right side
    13,772.20x = 80,791,709.85
  5. Step 5: Solve for x
    x = 80,791,709.85/13,772.20
  6. Step 6: Final answer
    x = 5,866.29

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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.