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Finding the Fourth Proportional to 20,505.70, 30,760.07 and 7,358.19

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Solution

The fourth proportional to 20,505.70, 30,760.07 and 7,358.19 is: 11,037.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505.70 : 30,760.07 = 7,358.19 : x
  2. Step 2: Convert to fraction form
    20,505.70/30,760.07 = 7,358.19/x
  3. Step 3: Cross multiply
    20,505.70x = 30,760.07 × 7,358.19
  4. Step 4: Simplify right side
    20,505.70x = 226,338,439.47
  5. Step 5: Solve for x
    x = 226,338,439.47/20,505.70
  6. Step 6: Final answer
    x = 11,037.83

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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.