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Finding the Fourth Proportional to 20,755.92, 28,644.03 and 11,805

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Solution

The fourth proportional to 20,755.92, 28,644.03 and 11,805 is: 16,291.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,755.92 : 28,644.03 = 11,805 : x
  2. Step 2: Convert to fraction form
    20,755.92/28,644.03 = 11,805/x
  3. Step 3: Cross multiply
    20,755.92x = 28,644.03 × 11,805
  4. Step 4: Simplify right side
    20,755.92x = 338,142,774.15
  5. Step 5: Solve for x
    x = 338,142,774.15/20,755.92
  6. Step 6: Final answer
    x = 16,291.39

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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.