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Finding the Fourth Proportional to 13,850.01, 20,781.09 and 7,274.61

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Solution

The fourth proportional to 13,850.01, 20,781.09 and 7,274.61 is: 10,915.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,850.01 : 20,781.09 = 7,274.61 : x
  2. Step 2: Convert to fraction form
    13,850.01/20,781.09 = 7,274.61/x
  3. Step 3: Cross multiply
    13,850.01x = 20,781.09 × 7,274.61
  4. Step 4: Simplify right side
    13,850.01x = 151,174,325.12
  5. Step 5: Solve for x
    x = 151,174,325.12/13,850.01
  6. Step 6: Final answer
    x = 10,915.11

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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.