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Finding the Fourth Proportional to 8,460.92, 12,692.74 and 2,912.90

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Solution

The fourth proportional to 8,460.92, 12,692.74 and 2,912.90 is: 4,369.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,460.92 : 12,692.74 = 2,912.90 : x
  2. Step 2: Convert to fraction form
    8,460.92/12,692.74 = 2,912.90/x
  3. Step 3: Cross multiply
    8,460.92x = 12,692.74 × 2,912.90
  4. Step 4: Simplify right side
    8,460.92x = 36,972,682.35
  5. Step 5: Solve for x
    x = 36,972,682.35/8,460.92
  6. Step 6: Final answer
    x = 4,369.82

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1.5x scale

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.