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Finding the Fourth Proportional to 11,661.21, 17,491.91 and 4,265.91

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Solution

The fourth proportional to 11,661.21, 17,491.91 and 4,265.91 is: 6,398.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,661.21 : 17,491.91 = 4,265.91 : x
  2. Step 2: Convert to fraction form
    11,661.21/17,491.91 = 4,265.91/x
  3. Step 3: Cross multiply
    11,661.21x = 17,491.91 × 4,265.91
  4. Step 4: Simplify right side
    11,661.21x = 74,618,892.46
  5. Step 5: Solve for x
    x = 74,618,892.46/11,661.21
  6. Step 6: Final answer
    x = 6,398.90

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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.