Home / 20,078.12-30,118.66-5,286.94

Finding the Fourth Proportional to 20,078.12, 30,118.66 and 5,286.94

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Solution

The fourth proportional to 20,078.12, 30,118.66 and 5,286.94 is: 7,930.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.12 : 30,118.66 = 5,286.94 : x
  2. Step 2: Convert to fraction form
    20,078.12/30,118.66 = 5,286.94/x
  3. Step 3: Cross multiply
    20,078.12x = 30,118.66 × 5,286.94
  4. Step 4: Simplify right side
    20,078.12x = 159,235,489.53
  5. Step 5: Solve for x
    x = 159,235,489.53/20,078.12
  6. Step 6: Final answer
    x = 7,930.80

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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.