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Finding the Fourth Proportional to 18,913.32, 28,373.72 and 5,586.54

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Solution

The fourth proportional to 18,913.32, 28,373.72 and 5,586.54 is: 8,380.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,913.32 : 28,373.72 = 5,586.54 : x
  2. Step 2: Convert to fraction form
    18,913.32/28,373.72 = 5,586.54/x
  3. Step 3: Cross multiply
    18,913.32x = 28,373.72 × 5,586.54
  4. Step 4: Simplify right side
    18,913.32x = 158,510,921.73
  5. Step 5: Solve for x
    x = 158,510,921.73/18,913.32
  6. Step 6: Final answer
    x = 8,380.91

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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.