Home / 20,940.32-31,330.92-12,906.32

Finding the Fourth Proportional to 20,940.32, 31,330.92 and 12,906.32

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Solution

The fourth proportional to 20,940.32, 31,330.92 and 12,906.32 is: 19,310.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.32 : 31,330.92 = 12,906.32 : x
  2. Step 2: Convert to fraction form
    20,940.32/31,330.92 = 12,906.32/x
  3. Step 3: Cross multiply
    20,940.32x = 31,330.92 × 12,906.32
  4. Step 4: Simplify right side
    20,940.32x = 404,366,879.41
  5. Step 5: Solve for x
    x = 404,366,879.41/20,940.32
  6. Step 6: Final answer
    x = 19,310.44

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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.