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Finding the Fourth Proportional to 20,692.44, 28,555.02 and 11,260.80

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Solution

The fourth proportional to 20,692.44, 28,555.02 and 11,260.80 is: 15,539.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,692.44 : 28,555.02 = 11,260.80 : x
  2. Step 2: Convert to fraction form
    20,692.44/28,555.02 = 11,260.80/x
  3. Step 3: Cross multiply
    20,692.44x = 28,555.02 × 11,260.80
  4. Step 4: Simplify right side
    20,692.44x = 321,552,369.22
  5. Step 5: Solve for x
    x = 321,552,369.22/20,692.44
  6. Step 6: Final answer
    x = 15,539.61

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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.