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Finding the Fourth Proportional to 8,664.78, 12,997.16 and 3,474.30

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Solution

The fourth proportional to 8,664.78, 12,997.16 and 3,474.30 is: 5,211.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.78 : 12,997.16 = 3,474.30 : x
  2. Step 2: Convert to fraction form
    8,664.78/12,997.16 = 3,474.30/x
  3. Step 3: Cross multiply
    8,664.78x = 12,997.16 × 3,474.30
  4. Step 4: Simplify right side
    8,664.78x = 45,156,032.99
  5. Step 5: Solve for x
    x = 45,156,032.99/8,664.78
  6. Step 6: Final answer
    x = 5,211.45

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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.