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Finding the Fourth Proportional to 18,787.75, 28,183.75 and 6,308.64

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Solution

The fourth proportional to 18,787.75, 28,183.75 and 6,308.64 is: 9,463.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787.75 : 28,183.75 = 6,308.64 : x
  2. Step 2: Convert to fraction form
    18,787.75/28,183.75 = 6,308.64/x
  3. Step 3: Cross multiply
    18,787.75x = 28,183.75 × 6,308.64
  4. Step 4: Simplify right side
    18,787.75x = 177,801,116.83
  5. Step 5: Solve for x
    x = 177,801,116.83/18,787.75
  6. Step 6: Final answer
    x = 9,463.67

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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.