Home / 20,640.98-30,940.28-8,155.94

Finding the Fourth Proportional to 20,640.98, 30,940.28 and 8,155.94

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Solution

The fourth proportional to 20,640.98, 30,940.28 and 8,155.94 is: 12,225.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.98 : 30,940.28 = 8,155.94 : x
  2. Step 2: Convert to fraction form
    20,640.98/30,940.28 = 8,155.94/x
  3. Step 3: Cross multiply
    20,640.98x = 30,940.28 × 8,155.94
  4. Step 4: Simplify right side
    20,640.98x = 252,347,067.26
  5. Step 5: Solve for x
    x = 252,347,067.26/20,640.98
  6. Step 6: Final answer
    x = 12,225.54

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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.