Home / 20,517.60-30,794.40-12,187.20

Finding the Fourth Proportional to 20,517.60, 30,794.40 and 12,187.20

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Solution

The fourth proportional to 20,517.60, 30,794.40 and 12,187.20 is: 18,291.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.60 : 30,794.40 = 12,187.20 : x
  2. Step 2: Convert to fraction form
    20,517.60/30,794.40 = 12,187.20/x
  3. Step 3: Cross multiply
    20,517.60x = 30,794.40 × 12,187.20
  4. Step 4: Simplify right side
    20,517.60x = 375,297,511.68
  5. Step 5: Solve for x
    x = 375,297,511.68/20,517.60
  6. Step 6: Final answer
    x = 18,291.49

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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.