Home / 13,520.12-20,281.39-5,203.85

Finding the Fourth Proportional to 13,520.12, 20,281.39 and 5,203.85

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Solution

The fourth proportional to 13,520.12, 20,281.39 and 5,203.85 is: 7,806.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.12 : 20,281.39 = 5,203.85 : x
  2. Step 2: Convert to fraction form
    13,520.12/20,281.39 = 5,203.85/x
  3. Step 3: Cross multiply
    13,520.12x = 20,281.39 × 5,203.85
  4. Step 4: Simplify right side
    13,520.12x = 105,541,196.93
  5. Step 5: Solve for x
    x = 105,541,196.93/13,520.12
  6. Step 6: Final answer
    x = 7,806.24

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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.