Home / 20,286.45-30,429.72-7,135.83

Finding the Fourth Proportional to 20,286.45, 30,429.72 and 7,135.83

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Solution

The fourth proportional to 20,286.45, 30,429.72 and 7,135.83 is: 10,703.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,286.45 : 30,429.72 = 7,135.83 : x
  2. Step 2: Convert to fraction form
    20,286.45/30,429.72 = 7,135.83/x
  3. Step 3: Cross multiply
    20,286.45x = 30,429.72 × 7,135.83
  4. Step 4: Simplify right side
    20,286.45x = 217,141,308.87
  5. Step 5: Solve for x
    x = 217,141,308.87/20,286.45
  6. Step 6: Final answer
    x = 10,703.76

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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.