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Finding the Fourth Proportional to 12,239.01, 18,361.35 and 3,919.59

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Solution

The fourth proportional to 12,239.01, 18,361.35 and 3,919.59 is: 5,880.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239.01 : 18,361.35 = 3,919.59 : x
  2. Step 2: Convert to fraction form
    12,239.01/18,361.35 = 3,919.59/x
  3. Step 3: Cross multiply
    12,239.01x = 18,361.35 × 3,919.59
  4. Step 4: Simplify right side
    12,239.01x = 71,968,963.85
  5. Step 5: Solve for x
    x = 71,968,963.85/12,239.01
  6. Step 6: Final answer
    x = 5,880.29

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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.