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Finding the Fourth Proportional to 29,721.40, 44,544.30 and 12,171.40

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Solution

The fourth proportional to 29,721.40, 44,544.30 and 12,171.40 is: 18,241.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,721.40 : 44,544.30 = 12,171.40 : x
  2. Step 2: Convert to fraction form
    29,721.40/44,544.30 = 12,171.40/x
  3. Step 3: Cross multiply
    29,721.40x = 44,544.30 × 12,171.40
  4. Step 4: Simplify right side
    29,721.40x = 542,166,493.02
  5. Step 5: Solve for x
    x = 542,166,493.02/29,721.40
  6. Step 6: Final answer
    x = 18,241.62

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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.