Home / 13,520.25-20,280.38-4,286.25

Finding the Fourth Proportional to 13,520.25, 20,280.38 and 4,286.25

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Solution

The fourth proportional to 13,520.25, 20,280.38 and 4,286.25 is: 6,429.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.25 : 20,280.38 = 4,286.25 : x
  2. Step 2: Convert to fraction form
    13,520.25/20,280.38 = 4,286.25/x
  3. Step 3: Cross multiply
    13,520.25x = 20,280.38 × 4,286.25
  4. Step 4: Simplify right side
    13,520.25x = 86,926,757.34
  5. Step 5: Solve for x
    x = 86,926,757.34/13,520.25
  6. Step 6: Final answer
    x = 6,429.38

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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.