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Finding the Fourth Proportional to 18,628.44, 27,942.90 and 5,481.10

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Solution

The fourth proportional to 18,628.44, 27,942.90 and 5,481.10 is: 8,221.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,628.44 : 27,942.90 = 5,481.10 : x
  2. Step 2: Convert to fraction form
    18,628.44/27,942.90 = 5,481.10/x
  3. Step 3: Cross multiply
    18,628.44x = 27,942.90 × 5,481.10
  4. Step 4: Simplify right side
    18,628.44x = 153,157,829.19
  5. Step 5: Solve for x
    x = 153,157,829.19/18,628.44
  6. Step 6: Final answer
    x = 8,221.72

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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.