Home / 13,229.80-18,255.16-8,520.46

Finding the Fourth Proportional to 13,229.80, 18,255.16 and 8,520.46

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Solution

The fourth proportional to 13,229.80, 18,255.16 and 8,520.46 is: 11,756.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,229.80 : 18,255.16 = 8,520.46 : x
  2. Step 2: Convert to fraction form
    13,229.80/18,255.16 = 8,520.46/x
  3. Step 3: Cross multiply
    13,229.80x = 18,255.16 × 8,520.46
  4. Step 4: Simplify right side
    13,229.80x = 155,542,360.57
  5. Step 5: Solve for x
    x = 155,542,360.57/13,229.80
  6. Step 6: Final answer
    x = 11,756.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.