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Finding the Fourth Proportional to 18,772.56, 28,158.84 and 5,624.64

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Solution

The fourth proportional to 18,772.56, 28,158.84 and 5,624.64 is: 8,436.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,772.56 : 28,158.84 = 5,624.64 : x
  2. Step 2: Convert to fraction form
    18,772.56/28,158.84 = 5,624.64/x
  3. Step 3: Cross multiply
    18,772.56x = 28,158.84 × 5,624.64
  4. Step 4: Simplify right side
    18,772.56x = 158,383,337.82
  5. Step 5: Solve for x
    x = 158,383,337.82/18,772.56
  6. Step 6: Final answer
    x = 8,436.96

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1.5x scale

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.