Home / 20,879.20-31,329.78-9,200.44

Finding the Fourth Proportional to 20,879.20, 31,329.78 and 9,200.44

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Solution

The fourth proportional to 20,879.20, 31,329.78 and 9,200.44 is: 13,805.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.20 : 31,329.78 = 9,200.44 : x
  2. Step 2: Convert to fraction form
    20,879.20/31,329.78 = 9,200.44/x
  3. Step 3: Cross multiply
    20,879.20x = 31,329.78 × 9,200.44
  4. Step 4: Simplify right side
    20,879.20x = 288,247,761.10
  5. Step 5: Solve for x
    x = 288,247,761.10/20,879.20
  6. Step 6: Final answer
    x = 13,805.50

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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.