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Finding the Fourth Proportional to 11,891.61, 17,837.31 and 3,572.34

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Solution

The fourth proportional to 11,891.61, 17,837.31 and 3,572.34 is: 5,358.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,891.61 : 17,837.31 = 3,572.34 : x
  2. Step 2: Convert to fraction form
    11,891.61/17,837.31 = 3,572.34/x
  3. Step 3: Cross multiply
    11,891.61x = 17,837.31 × 3,572.34
  4. Step 4: Simplify right side
    11,891.61x = 63,720,936.01
  5. Step 5: Solve for x
    x = 63,720,936.01/11,891.61
  6. Step 6: Final answer
    x = 5,358.48

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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.