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Finding the Fourth Proportional to 21,893.78, 32,840.52 and 8,568.12

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Solution

The fourth proportional to 21,893.78, 32,840.52 and 8,568.12 is: 12,852.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,893.78 : 32,840.52 = 8,568.12 : x
  2. Step 2: Convert to fraction form
    21,893.78/32,840.52 = 8,568.12/x
  3. Step 3: Cross multiply
    21,893.78x = 32,840.52 × 8,568.12
  4. Step 4: Simplify right side
    21,893.78x = 281,381,516.22
  5. Step 5: Solve for x
    x = 281,381,516.22/21,893.78
  6. Step 6: Final answer
    x = 12,852.12

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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.