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Finding the Fourth Proportional to 20,900.46, 28,843.11 and 11,469

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Solution

The fourth proportional to 20,900.46, 28,843.11 and 11,469 is: 15,827.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.46 : 28,843.11 = 11,469 : x
  2. Step 2: Convert to fraction form
    20,900.46/28,843.11 = 11,469/x
  3. Step 3: Cross multiply
    20,900.46x = 28,843.11 × 11,469
  4. Step 4: Simplify right side
    20,900.46x = 330,801,628.59
  5. Step 5: Solve for x
    x = 330,801,628.59/20,900.46
  6. Step 6: Final answer
    x = 15,827.48

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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.