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Finding the Fourth Proportional to 8,692.11, 13,020.70 and 4,005.55

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Solution

The fourth proportional to 8,692.11, 13,020.70 and 4,005.55 is: 6,000.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,692.11 : 13,020.70 = 4,005.55 : x
  2. Step 2: Convert to fraction form
    8,692.11/13,020.70 = 4,005.55/x
  3. Step 3: Cross multiply
    8,692.11x = 13,020.70 × 4,005.55
  4. Step 4: Simplify right side
    8,692.11x = 52,155,078.66
  5. Step 5: Solve for x
    x = 52,155,078.66/8,692.11
  6. Step 6: Final answer
    x = 6,000.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.