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Finding the Fourth Proportional to 11,889.21, 17,833.79 and 3,569.21

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Solution

The fourth proportional to 11,889.21, 17,833.79 and 3,569.21 is: 5,353.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,889.21 : 17,833.79 = 3,569.21 : x
  2. Step 2: Convert to fraction form
    11,889.21/17,833.79 = 3,569.21/x
  3. Step 3: Cross multiply
    11,889.21x = 17,833.79 × 3,569.21
  4. Step 4: Simplify right side
    11,889.21x = 63,652,541.61
  5. Step 5: Solve for x
    x = 63,652,541.61/11,889.21
  6. Step 6: Final answer
    x = 5,353.81

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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.