Home / 18,972.43-28,474.13-13,431.15

Finding the Fourth Proportional to 18,972.43, 28,474.13 and 13,431.15

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Solution

The fourth proportional to 18,972.43, 28,474.13 and 13,431.15 is: 20,157.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,972.43 : 28,474.13 = 13,431.15 : x
  2. Step 2: Convert to fraction form
    18,972.43/28,474.13 = 13,431.15/x
  3. Step 3: Cross multiply
    18,972.43x = 28,474.13 × 13,431.15
  4. Step 4: Simplify right side
    18,972.43x = 382,440,344.73
  5. Step 5: Solve for x
    x = 382,440,344.73/18,972.43
  6. Step 6: Final answer
    x = 20,157.69

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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.