Home / 13,520.26-20,280.36-3,659.80

Finding the Fourth Proportional to 13,520.26, 20,280.36 and 3,659.80

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Solution

The fourth proportional to 13,520.26, 20,280.36 and 3,659.80 is: 5,489.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.26 : 20,280.36 = 3,659.80 : x
  2. Step 2: Convert to fraction form
    13,520.26/20,280.36 = 3,659.80/x
  3. Step 3: Cross multiply
    13,520.26x = 20,280.36 × 3,659.80
  4. Step 4: Simplify right side
    13,520.26x = 74,222,061.53
  5. Step 5: Solve for x
    x = 74,222,061.53/13,520.26
  6. Step 6: Final answer
    x = 5,489.69

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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.