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Finding the Fourth Proportional to 8,692.72, 12,000.40 and 6,800.96

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Solution

The fourth proportional to 8,692.72, 12,000.40 and 6,800.96 is: 9,388.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,692.72 : 12,000.40 = 6,800.96 : x
  2. Step 2: Convert to fraction form
    8,692.72/12,000.40 = 6,800.96/x
  3. Step 3: Cross multiply
    8,692.72x = 12,000.40 × 6,800.96
  4. Step 4: Simplify right side
    8,692.72x = 81,614,240.38
  5. Step 5: Solve for x
    x = 81,614,240.38/8,692.72
  6. Step 6: Final answer
    x = 9,388.80

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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.