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Finding the Fourth Proportional to 18,956.93, 28,380.29 and 11,035.31

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Solution

The fourth proportional to 18,956.93, 28,380.29 and 11,035.31 is: 16,520.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,956.93 : 28,380.29 = 11,035.31 : x
  2. Step 2: Convert to fraction form
    18,956.93/28,380.29 = 11,035.31/x
  3. Step 3: Cross multiply
    18,956.93x = 28,380.29 × 11,035.31
  4. Step 4: Simplify right side
    18,956.93x = 313,185,100.96
  5. Step 5: Solve for x
    x = 313,185,100.96/18,956.93
  6. Step 6: Final answer
    x = 16,520.88

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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.