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Finding the Fourth Proportional to 18,789.62, 28,171.08 and 9,422.88

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Solution

The fourth proportional to 18,789.62, 28,171.08 and 9,422.88 is: 14,127.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,789.62 : 28,171.08 = 9,422.88 : x
  2. Step 2: Convert to fraction form
    18,789.62/28,171.08 = 9,422.88/x
  3. Step 3: Cross multiply
    18,789.62x = 28,171.08 × 9,422.88
  4. Step 4: Simplify right side
    18,789.62x = 265,452,706.31
  5. Step 5: Solve for x
    x = 265,452,706.31/18,789.62
  6. Step 6: Final answer
    x = 14,127.63

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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.