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Finding the Fourth Proportional to 18,422.70, 27,630.12 and 5,271.54

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Solution

The fourth proportional to 18,422.70, 27,630.12 and 5,271.54 is: 7,906.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,422.70 : 27,630.12 = 5,271.54 : x
  2. Step 2: Convert to fraction form
    18,422.70/27,630.12 = 5,271.54/x
  3. Step 3: Cross multiply
    18,422.70x = 27,630.12 × 5,271.54
  4. Step 4: Simplify right side
    18,422.70x = 145,653,282.78
  5. Step 5: Solve for x
    x = 145,653,282.78/18,422.70
  6. Step 6: Final answer
    x = 7,906.19

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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.