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Finding the Fourth Proportional to 20,692.38, 28,554.54 and 11,260.92

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Solution

The fourth proportional to 20,692.38, 28,554.54 and 11,260.92 is: 15,539.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,692.38 : 28,554.54 = 11,260.92 : x
  2. Step 2: Convert to fraction form
    20,692.38/28,554.54 = 11,260.92/x
  3. Step 3: Cross multiply
    20,692.38x = 28,554.54 × 11,260.92
  4. Step 4: Simplify right side
    20,692.38x = 321,550,390.58
  5. Step 5: Solve for x
    x = 321,550,390.58/20,692.38
  6. Step 6: Final answer
    x = 15,539.56

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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.