Home / 20,768.97-28,661.16-11,337.53

Finding the Fourth Proportional to 20,768.97, 28,661.16 and 11,337.53

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Solution

The fourth proportional to 20,768.97, 28,661.16 and 11,337.53 is: 15,645.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.97 : 28,661.16 = 11,337.53 : x
  2. Step 2: Convert to fraction form
    20,768.97/28,661.16 = 11,337.53/x
  3. Step 3: Cross multiply
    20,768.97x = 28,661.16 × 11,337.53
  4. Step 4: Simplify right side
    20,768.97x = 324,946,618.03
  5. Step 5: Solve for x
    x = 324,946,618.03/20,768.97
  6. Step 6: Final answer
    x = 15,645.78

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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.