Home / 20,198.40-27,872.71-11,245.67

Finding the Fourth Proportional to 20,198.40, 27,872.71 and 11,245.67

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Solution

The fourth proportional to 20,198.40, 27,872.71 and 11,245.67 is: 15,518.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,198.40 : 27,872.71 = 11,245.67 : x
  2. Step 2: Convert to fraction form
    20,198.40/27,872.71 = 11,245.67/x
  3. Step 3: Cross multiply
    20,198.40x = 27,872.71 × 11,245.67
  4. Step 4: Simplify right side
    20,198.40x = 313,447,298.67
  5. Step 5: Solve for x
    x = 313,447,298.67/20,198.40
  6. Step 6: Final answer
    x = 15,518.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.