Home / 20,768.64-28,660.80-11,337.12

Finding the Fourth Proportional to 20,768.64, 28,660.80 and 11,337.12

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Solution

The fourth proportional to 20,768.64, 28,660.80 and 11,337.12 is: 15,645.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.64 : 28,660.80 = 11,337.12 : x
  2. Step 2: Convert to fraction form
    20,768.64/28,660.80 = 11,337.12/x
  3. Step 3: Cross multiply
    20,768.64x = 28,660.80 × 11,337.12
  4. Step 4: Simplify right side
    20,768.64x = 324,930,928.90
  5. Step 5: Solve for x
    x = 324,930,928.90/20,768.64
  6. Step 6: Final answer
    x = 15,645.27

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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.