Home / 20,768.16-28,659.92-11,336.64

Finding the Fourth Proportional to 20,768.16, 28,659.92 and 11,336.64

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Solution

The fourth proportional to 20,768.16, 28,659.92 and 11,336.64 is: 15,644.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.16 : 28,659.92 = 11,336.64 : x
  2. Step 2: Convert to fraction form
    20,768.16/28,659.92 = 11,336.64/x
  3. Step 3: Cross multiply
    20,768.16x = 28,659.92 × 11,336.64
  4. Step 4: Simplify right side
    20,768.16x = 324,907,195.47
  5. Step 5: Solve for x
    x = 324,907,195.47/20,768.16
  6. Step 6: Final answer
    x = 15,644.49

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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.