Home / 20,640.39-30,960.58-5,057.88

Finding the Fourth Proportional to 20,640.39, 30,960.58 and 5,057.88

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Solution

The fourth proportional to 20,640.39, 30,960.58 and 5,057.88 is: 7,586.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.39 : 30,960.58 = 5,057.88 : x
  2. Step 2: Convert to fraction form
    20,640.39/30,960.58 = 5,057.88/x
  3. Step 3: Cross multiply
    20,640.39x = 30,960.58 × 5,057.88
  4. Step 4: Simplify right side
    20,640.39x = 156,594,898.37
  5. Step 5: Solve for x
    x = 156,594,898.37/20,640.39
  6. Step 6: Final answer
    x = 7,586.82

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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.