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Finding the Fourth Proportional to 18,520.70, 27,787.53 and 5,373.86

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Solution

The fourth proportional to 18,520.70, 27,787.53 and 5,373.86 is: 8,062.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,520.70 : 27,787.53 = 5,373.86 : x
  2. Step 2: Convert to fraction form
    18,520.70/27,787.53 = 5,373.86/x
  3. Step 3: Cross multiply
    18,520.70x = 27,787.53 × 5,373.86
  4. Step 4: Simplify right side
    18,520.70x = 149,326,295.97
  5. Step 5: Solve for x
    x = 149,326,295.97/18,520.70
  6. Step 6: Final answer
    x = 8,062.67

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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.