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Finding the Fourth Proportional to 18,622.54, 27,942.90 and 8,762.80

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Solution

The fourth proportional to 18,622.54, 27,942.90 and 8,762.80 is: 13,148.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,622.54 : 27,942.90 = 8,762.80 : x
  2. Step 2: Convert to fraction form
    18,622.54/27,942.90 = 8,762.80/x
  3. Step 3: Cross multiply
    18,622.54x = 27,942.90 × 8,762.80
  4. Step 4: Simplify right side
    18,622.54x = 244,858,044.12
  5. Step 5: Solve for x
    x = 244,858,044.12/18,622.54
  6. Step 6: Final answer
    x = 13,148.48

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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.