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Finding the Fourth Proportional to 21,910.74, 32,865.62 and 6,115.36

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Solution

The fourth proportional to 21,910.74, 32,865.62 and 6,115.36 is: 9,172.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,910.74 : 32,865.62 = 6,115.36 : x
  2. Step 2: Convert to fraction form
    21,910.74/32,865.62 = 6,115.36/x
  3. Step 3: Cross multiply
    21,910.74x = 32,865.62 × 6,115.36
  4. Step 4: Simplify right side
    21,910.74x = 200,985,097.92
  5. Step 5: Solve for x
    x = 200,985,097.92/21,910.74
  6. Step 6: Final answer
    x = 9,172.90

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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.