Home / 13,786.80-20,680.20-3,926.40

Finding the Fourth Proportional to 13,786.80, 20,680.20 and 3,926.40

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Solution

The fourth proportional to 13,786.80, 20,680.20 and 3,926.40 is: 5,889.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,786.80 : 20,680.20 = 3,926.40 : x
  2. Step 2: Convert to fraction form
    13,786.80/20,680.20 = 3,926.40/x
  3. Step 3: Cross multiply
    13,786.80x = 20,680.20 × 3,926.40
  4. Step 4: Simplify right side
    13,786.80x = 81,198,737.28
  5. Step 5: Solve for x
    x = 81,198,737.28/13,786.80
  6. Step 6: Final answer
    x = 5,889.60

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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.