Home / 20,286.24-30,429.36-8,439.79

Finding the Fourth Proportional to 20,286.24, 30,429.36 and 8,439.79

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Solution

The fourth proportional to 20,286.24, 30,429.36 and 8,439.79 is: 12,659.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,286.24 : 30,429.36 = 8,439.79 : x
  2. Step 2: Convert to fraction form
    20,286.24/30,429.36 = 8,439.79/x
  3. Step 3: Cross multiply
    20,286.24x = 30,429.36 × 8,439.79
  4. Step 4: Simplify right side
    20,286.24x = 256,817,408.23
  5. Step 5: Solve for x
    x = 256,817,408.23/20,286.24
  6. Step 6: Final answer
    x = 12,659.69

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Similar ratio
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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.