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Finding the Fourth Proportional to 20,965.92, 28,858.24 and 17,388.96

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Solution

The fourth proportional to 20,965.92, 28,858.24 and 17,388.96 is: 23,934.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.92 : 28,858.24 = 17,388.96 : x
  2. Step 2: Convert to fraction form
    20,965.92/28,858.24 = 17,388.96/x
  3. Step 3: Cross multiply
    20,965.92x = 28,858.24 × 17,388.96
  4. Step 4: Simplify right side
    20,965.92x = 501,814,781.03
  5. Step 5: Solve for x
    x = 501,814,781.03/20,965.92
  6. Step 6: Final answer
    x = 23,934.78

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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.