Home / 20,660.54-28,511.33-11,229.03

Finding the Fourth Proportional to 20,660.54, 28,511.33 and 11,229.03

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Solution

The fourth proportional to 20,660.54, 28,511.33 and 11,229.03 is: 15,495.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.54 : 28,511.33 = 11,229.03 : x
  2. Step 2: Convert to fraction form
    20,660.54/28,511.33 = 11,229.03/x
  3. Step 3: Cross multiply
    20,660.54x = 28,511.33 × 11,229.03
  4. Step 4: Simplify right side
    20,660.54x = 320,154,523.76
  5. Step 5: Solve for x
    x = 320,154,523.76/20,660.54
  6. Step 6: Final answer
    x = 15,495.95

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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.