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Finding the Fourth Proportional to 21,231.44, 31,847.06 and 5,436.44

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Solution

The fourth proportional to 21,231.44, 31,847.06 and 5,436.44 is: 8,154.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.44 : 31,847.06 = 5,436.44 : x
  2. Step 2: Convert to fraction form
    21,231.44/31,847.06 = 5,436.44/x
  3. Step 3: Cross multiply
    21,231.44x = 31,847.06 × 5,436.44
  4. Step 4: Simplify right side
    21,231.44x = 173,134,630.87
  5. Step 5: Solve for x
    x = 173,134,630.87/21,231.44
  6. Step 6: Final answer
    x = 8,154.63

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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.