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Finding the Fourth Proportional to 12,662.56, 18,988.06 and 5,262.61

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Solution

The fourth proportional to 12,662.56, 18,988.06 and 5,262.61 is: 7,891.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,662.56 : 18,988.06 = 5,262.61 : x
  2. Step 2: Convert to fraction form
    12,662.56/18,988.06 = 5,262.61/x
  3. Step 3: Cross multiply
    12,662.56x = 18,988.06 × 5,262.61
  4. Step 4: Simplify right side
    12,662.56x = 99,926,754.44
  5. Step 5: Solve for x
    x = 99,926,754.44/12,662.56
  6. Step 6: Final answer
    x = 7,891.51

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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.