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Finding the Fourth Proportional to 18,622.80, 27,918.48 and 8,084.88

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Solution

The fourth proportional to 18,622.80, 27,918.48 and 8,084.88 is: 12,120.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,622.80 : 27,918.48 = 8,084.88 : x
  2. Step 2: Convert to fraction form
    18,622.80/27,918.48 = 8,084.88/x
  3. Step 3: Cross multiply
    18,622.80x = 27,918.48 × 8,084.88
  4. Step 4: Simplify right side
    18,622.80x = 225,717,560.58
  5. Step 5: Solve for x
    x = 225,717,560.58/18,622.80
  6. Step 6: Final answer
    x = 12,120.50

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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.