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Finding the Fourth Proportional to 20,797.50, 28,698.92 and 11,843.22

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Solution

The fourth proportional to 20,797.50, 28,698.92 and 11,843.22 is: 16,342.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,797.50 : 28,698.92 = 11,843.22 : x
  2. Step 2: Convert to fraction form
    20,797.50/28,698.92 = 11,843.22/x
  3. Step 3: Cross multiply
    20,797.50x = 28,698.92 × 11,843.22
  4. Step 4: Simplify right side
    20,797.50x = 339,887,564.11
  5. Step 5: Solve for x
    x = 339,887,564.11/20,797.50
  6. Step 6: Final answer
    x = 16,342.71

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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.