Home / 13,520.20-20,280.30-4,286.20

Finding the Fourth Proportional to 13,520.20, 20,280.30 and 4,286.20

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Solution

The fourth proportional to 13,520.20, 20,280.30 and 4,286.20 is: 6,429.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.20 : 20,280.30 = 4,286.20 : x
  2. Step 2: Convert to fraction form
    13,520.20/20,280.30 = 4,286.20/x
  3. Step 3: Cross multiply
    13,520.20x = 20,280.30 × 4,286.20
  4. Step 4: Simplify right side
    13,520.20x = 86,925,421.86
  5. Step 5: Solve for x
    x = 86,925,421.86/13,520.20
  6. Step 6: Final answer
    x = 6,429.30

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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.