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Finding the Fourth Proportional to 13,168, 18,174.88 and 8,692.64

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Solution

The fourth proportional to 13,168, 18,174.88 and 8,692.64 is: 11,997.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,168 : 18,174.88 = 8,692.64 : x
  2. Step 2: Convert to fraction form
    13,168/18,174.88 = 8,692.64/x
  3. Step 3: Cross multiply
    13,168x = 18,174.88 × 8,692.64
  4. Step 4: Simplify right side
    13,168x = 157,987,688.88
  5. Step 5: Solve for x
    x = 157,987,688.88/13,168
  6. Step 6: Final answer
    x = 11,997.85

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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.