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Finding the Fourth Proportional to 11,939.64, 17,900.14 and 5,361.22

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Solution

The fourth proportional to 11,939.64, 17,900.14 and 5,361.22 is: 8,037.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,939.64 : 17,900.14 = 5,361.22 : x
  2. Step 2: Convert to fraction form
    11,939.64/17,900.14 = 5,361.22/x
  3. Step 3: Cross multiply
    11,939.64x = 17,900.14 × 5,361.22
  4. Step 4: Simplify right side
    11,939.64x = 95,966,588.57
  5. Step 5: Solve for x
    x = 95,966,588.57/11,939.64
  6. Step 6: Final answer
    x = 8,037.65

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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.