Home / 20,078.07-30,121.19-6,928.73

Finding the Fourth Proportional to 20,078.07, 30,121.19 and 6,928.73

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Solution

The fourth proportional to 20,078.07, 30,121.19 and 6,928.73 is: 10,394.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.07 : 30,121.19 = 6,928.73 : x
  2. Step 2: Convert to fraction form
    20,078.07/30,121.19 = 6,928.73/x
  3. Step 3: Cross multiply
    20,078.07x = 30,121.19 × 6,928.73
  4. Step 4: Simplify right side
    20,078.07x = 208,701,407.54
  5. Step 5: Solve for x
    x = 208,701,407.54/20,078.07
  6. Step 6: Final answer
    x = 10,394.50

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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.