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Finding the Fourth Proportional to 20,900.43, 28,843.43 and 11,469.33

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Solution

The fourth proportional to 20,900.43, 28,843.43 and 11,469.33 is: 15,828.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.43 : 28,843.43 = 11,469.33 : x
  2. Step 2: Convert to fraction form
    20,900.43/28,843.43 = 11,469.33/x
  3. Step 3: Cross multiply
    20,900.43x = 28,843.43 × 11,469.33
  4. Step 4: Simplify right side
    20,900.43x = 330,814,759.66
  5. Step 5: Solve for x
    x = 330,814,759.66/20,900.43
  6. Step 6: Final answer
    x = 15,828.13

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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.