Home / 20,336.70-30,505.21-7,860.78

Finding the Fourth Proportional to 20,336.70, 30,505.21 and 7,860.78

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Solution

The fourth proportional to 20,336.70, 30,505.21 and 7,860.78 is: 11,791.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,336.70 : 30,505.21 = 7,860.78 : x
  2. Step 2: Convert to fraction form
    20,336.70/30,505.21 = 7,860.78/x
  3. Step 3: Cross multiply
    20,336.70x = 30,505.21 × 7,860.78
  4. Step 4: Simplify right side
    20,336.70x = 239,794,725.01
  5. Step 5: Solve for x
    x = 239,794,725.01/20,336.70
  6. Step 6: Final answer
    x = 11,791.23

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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.