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Finding the Fourth Proportional to 11,891.96, 17,821.54 and 8,967.05

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Solution

The fourth proportional to 11,891.96, 17,821.54 and 8,967.05 is: 13,438.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,891.96 : 17,821.54 = 8,967.05 : x
  2. Step 2: Convert to fraction form
    11,891.96/17,821.54 = 8,967.05/x
  3. Step 3: Cross multiply
    11,891.96x = 17,821.54 × 8,967.05
  4. Step 4: Simplify right side
    11,891.96x = 159,806,696.02
  5. Step 5: Solve for x
    x = 159,806,696.02/11,891.96
  6. Step 6: Final answer
    x = 13,438.21

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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.