Home / 20,660.58-28,511.64-11,229.12

Finding the Fourth Proportional to 20,660.58, 28,511.64 and 11,229.12

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Solution

The fourth proportional to 20,660.58, 28,511.64 and 11,229.12 is: 15,496.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.58 : 28,511.64 = 11,229.12 : x
  2. Step 2: Convert to fraction form
    20,660.58/28,511.64 = 11,229.12/x
  3. Step 3: Cross multiply
    20,660.58x = 28,511.64 × 11,229.12
  4. Step 4: Simplify right side
    20,660.58x = 320,160,626.96
  5. Step 5: Solve for x
    x = 320,160,626.96/20,660.58
  6. Step 6: Final answer
    x = 15,496.21

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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.