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Finding the Fourth Proportional to 18,704.70, 28,060.20 and 5,558.40

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Solution

The fourth proportional to 18,704.70, 28,060.20 and 5,558.40 is: 8,338.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,704.70 : 28,060.20 = 5,558.40 : x
  2. Step 2: Convert to fraction form
    18,704.70/28,060.20 = 5,558.40/x
  3. Step 3: Cross multiply
    18,704.70x = 28,060.20 × 5,558.40
  4. Step 4: Simplify right side
    18,704.70x = 155,969,815.68
  5. Step 5: Solve for x
    x = 155,969,815.68/18,704.70
  6. Step 6: Final answer
    x = 8,338.54

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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.