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Finding the Fourth Proportional to 15,766.60, 21,757.94 and 8,692.86

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Solution

The fourth proportional to 15,766.60, 21,757.94 and 8,692.86 is: 11,996.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,766.60 : 21,757.94 = 8,692.86 : x
  2. Step 2: Convert to fraction form
    15,766.60/21,757.94 = 8,692.86/x
  3. Step 3: Cross multiply
    15,766.60x = 21,757.94 × 8,692.86
  4. Step 4: Simplify right side
    15,766.60x = 189,138,726.31
  5. Step 5: Solve for x
    x = 189,138,726.31/15,766.60
  6. Step 6: Final answer
    x = 11,996.16

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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.