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Finding the Fourth Proportional to 20,692.13, 28,555.13 and 11,260.76

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Solution

The fourth proportional to 20,692.13, 28,555.13 and 11,260.76 is: 15,539.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,692.13 : 28,555.13 = 11,260.76 : x
  2. Step 2: Convert to fraction form
    20,692.13/28,555.13 = 11,260.76/x
  3. Step 3: Cross multiply
    20,692.13x = 28,555.13 × 11,260.76
  4. Step 4: Simplify right side
    20,692.13x = 321,552,351.08
  5. Step 5: Solve for x
    x = 321,552,351.08/20,692.13
  6. Step 6: Final answer
    x = 15,539.84

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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.