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Finding the Fourth Proportional to 21,912.35, 32,844.82 and 8,750.25

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Solution

The fourth proportional to 21,912.35, 32,844.82 and 8,750.25 is: 13,115.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,912.35 : 32,844.82 = 8,750.25 : x
  2. Step 2: Convert to fraction form
    21,912.35/32,844.82 = 8,750.25/x
  3. Step 3: Cross multiply
    21,912.35x = 32,844.82 × 8,750.25
  4. Step 4: Simplify right side
    21,912.35x = 287,400,397.14
  5. Step 5: Solve for x
    x = 287,400,397.14/21,912.35
  6. Step 6: Final answer
    x = 13,115.91

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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.