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Finding the Fourth Proportional to 12,244.53, 18,361.53 and 3,921.78

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Solution

The fourth proportional to 12,244.53, 18,361.53 and 3,921.78 is: 5,880.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,244.53 : 18,361.53 = 3,921.78 : x
  2. Step 2: Convert to fraction form
    12,244.53/18,361.53 = 3,921.78/x
  3. Step 3: Cross multiply
    12,244.53x = 18,361.53 × 3,921.78
  4. Step 4: Simplify right side
    12,244.53x = 72,009,881.12
  5. Step 5: Solve for x
    x = 72,009,881.12/12,244.53
  6. Step 6: Final answer
    x = 5,880.98

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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.