Home / 20,135.40-30,198.78-6,276.84

Finding the Fourth Proportional to 20,135.40, 30,198.78 and 6,276.84

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Solution

The fourth proportional to 20,135.40, 30,198.78 and 6,276.84 is: 9,413.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.40 : 30,198.78 = 6,276.84 : x
  2. Step 2: Convert to fraction form
    20,135.40/30,198.78 = 6,276.84/x
  3. Step 3: Cross multiply
    20,135.40x = 30,198.78 × 6,276.84
  4. Step 4: Simplify right side
    20,135.40x = 189,552,910.26
  5. Step 5: Solve for x
    x = 189,552,910.26/20,135.40
  6. Step 6: Final answer
    x = 9,413.91

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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.