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Finding the Fourth Proportional to 18,520.65, 27,772.88 and 5,372.73

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Solution

The fourth proportional to 18,520.65, 27,772.88 and 5,372.73 is: 8,056.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,520.65 : 27,772.88 = 5,372.73 : x
  2. Step 2: Convert to fraction form
    18,520.65/27,772.88 = 5,372.73/x
  3. Step 3: Cross multiply
    18,520.65x = 27,772.88 × 5,372.73
  4. Step 4: Simplify right side
    18,520.65x = 149,216,158.70
  5. Step 5: Solve for x
    x = 149,216,158.70/18,520.65
  6. Step 6: Final answer
    x = 8,056.75

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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.