Home / 12,712.20-19,100.70-11,286.60

Finding the Fourth Proportional to 12,712.20, 19,100.70 and 11,286.60

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Solution

The fourth proportional to 12,712.20, 19,100.70 and 11,286.60 is: 16,958.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,712.20 : 19,100.70 = 11,286.60 : x
  2. Step 2: Convert to fraction form
    12,712.20/19,100.70 = 11,286.60/x
  3. Step 3: Cross multiply
    12,712.20x = 19,100.70 × 11,286.60
  4. Step 4: Simplify right side
    12,712.20x = 215,581,960.62
  5. Step 5: Solve for x
    x = 215,581,960.62/12,712.20
  6. Step 6: Final answer
    x = 16,958.67

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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.