Home / 20,660.82-28,511.78-11,229.45

Finding the Fourth Proportional to 20,660.82, 28,511.78 and 11,229.45

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Solution

The fourth proportional to 20,660.82, 28,511.78 and 11,229.45 is: 15,496.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.82 : 28,511.78 = 11,229.45 : x
  2. Step 2: Convert to fraction form
    20,660.82/28,511.78 = 11,229.45/x
  3. Step 3: Cross multiply
    20,660.82x = 28,511.78 × 11,229.45
  4. Step 4: Simplify right side
    20,660.82x = 320,171,551.77
  5. Step 5: Solve for x
    x = 320,171,551.77/20,660.82
  6. Step 6: Final answer
    x = 15,496.56

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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.