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Finding the Fourth Proportional to 20,791.86, 28,692.13 and 11,360.41

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Solution

The fourth proportional to 20,791.86, 28,692.13 and 11,360.41 is: 15,677.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.86 : 28,692.13 = 11,360.41 : x
  2. Step 2: Convert to fraction form
    20,791.86/28,692.13 = 11,360.41/x
  3. Step 3: Cross multiply
    20,791.86x = 28,692.13 × 11,360.41
  4. Step 4: Simplify right side
    20,791.86x = 325,954,360.57
  5. Step 5: Solve for x
    x = 325,954,360.57/20,791.86
  6. Step 6: Final answer
    x = 15,677.02

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.