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Finding the Fourth Proportional to 18,440.80, 27,661.20 and 8,576.80

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Solution

The fourth proportional to 18,440.80, 27,661.20 and 8,576.80 is: 12,865.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,440.80 : 27,661.20 = 8,576.80 : x
  2. Step 2: Convert to fraction form
    18,440.80/27,661.20 = 8,576.80/x
  3. Step 3: Cross multiply
    18,440.80x = 27,661.20 × 8,576.80
  4. Step 4: Simplify right side
    18,440.80x = 237,244,580.16
  5. Step 5: Solve for x
    x = 237,244,580.16/18,440.80
  6. Step 6: Final answer
    x = 12,865.20

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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.