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Finding the Fourth Proportional to 19,771.68, 29,640.72 and 8,669.94

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Solution

The fourth proportional to 19,771.68, 29,640.72 and 8,669.94 is: 12,997.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,771.68 : 29,640.72 = 8,669.94 : x
  2. Step 2: Convert to fraction form
    19,771.68/29,640.72 = 8,669.94/x
  3. Step 3: Cross multiply
    19,771.68x = 29,640.72 × 8,669.94
  4. Step 4: Simplify right side
    19,771.68x = 256,983,263.96
  5. Step 5: Solve for x
    x = 256,983,263.96/19,771.68
  6. Step 6: Final answer
    x = 12,997.54

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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.