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Finding the Fourth Proportional to 18,728.70, 28,096.70 and 5,580.78

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Solution

The fourth proportional to 18,728.70, 28,096.70 and 5,580.78 is: 8,372.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728.70 : 28,096.70 = 5,580.78 : x
  2. Step 2: Convert to fraction form
    18,728.70/28,096.70 = 5,580.78/x
  3. Step 3: Cross multiply
    18,728.70x = 28,096.70 × 5,580.78
  4. Step 4: Simplify right side
    18,728.70x = 156,801,473.52
  5. Step 5: Solve for x
    x = 156,801,473.52/18,728.70
  6. Step 6: Final answer
    x = 8,372.26

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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.