Home / 20,768.72-28,660.92-11,338.16

Finding the Fourth Proportional to 20,768.72, 28,660.92 and 11,338.16

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Solution

The fourth proportional to 20,768.72, 28,660.92 and 11,338.16 is: 15,646.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.72 : 28,660.92 = 11,338.16 : x
  2. Step 2: Convert to fraction form
    20,768.72/28,660.92 = 11,338.16/x
  3. Step 3: Cross multiply
    20,768.72x = 28,660.92 × 11,338.16
  4. Step 4: Simplify right side
    20,768.72x = 324,962,096.71
  5. Step 5: Solve for x
    x = 324,962,096.71/20,768.72
  6. Step 6: Final answer
    x = 15,646.71

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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.