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Finding the Fourth Proportional to 21,226.50, 31,844.61 and 7,375.50

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Solution

The fourth proportional to 21,226.50, 31,844.61 and 7,375.50 is: 11,064.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,226.50 : 31,844.61 = 7,375.50 : x
  2. Step 2: Convert to fraction form
    21,226.50/31,844.61 = 7,375.50/x
  3. Step 3: Cross multiply
    21,226.50x = 31,844.61 × 7,375.50
  4. Step 4: Simplify right side
    21,226.50x = 234,869,921.06
  5. Step 5: Solve for x
    x = 234,869,921.06/21,226.50
  6. Step 6: Final answer
    x = 11,064.94

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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.