Home / 13,420.20-20,122.30-8,229.80

Finding the Fourth Proportional to 13,420.20, 20,122.30 and 8,229.80

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Solution

The fourth proportional to 13,420.20, 20,122.30 and 8,229.80 is: 12,339.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.20 : 20,122.30 = 8,229.80 : x
  2. Step 2: Convert to fraction form
    13,420.20/20,122.30 = 8,229.80/x
  3. Step 3: Cross multiply
    13,420.20x = 20,122.30 × 8,229.80
  4. Step 4: Simplify right side
    13,420.20x = 165,602,504.54
  5. Step 5: Solve for x
    x = 165,602,504.54/13,420.20
  6. Step 6: Final answer
    x = 12,339.79

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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.