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Finding the Fourth Proportional to 20,900.94, 28,844.12 and 11,469.84

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Solution

The fourth proportional to 20,900.94, 28,844.12 and 11,469.84 is: 15,828.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.94 : 28,844.12 = 11,469.84 : x
  2. Step 2: Convert to fraction form
    20,900.94/28,844.12 = 11,469.84/x
  3. Step 3: Cross multiply
    20,900.94x = 28,844.12 × 11,469.84
  4. Step 4: Simplify right side
    20,900.94x = 330,837,441.34
  5. Step 5: Solve for x
    x = 330,837,441.34/20,900.94
  6. Step 6: Final answer
    x = 15,828.83

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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.