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Finding the Fourth Proportional to 7,889.31, 11,839.23 and 3,272.31

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Solution

The fourth proportional to 7,889.31, 11,839.23 and 3,272.31 is: 4,910.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,889.31 : 11,839.23 = 3,272.31 : x
  2. Step 2: Convert to fraction form
    7,889.31/11,839.23 = 3,272.31/x
  3. Step 3: Cross multiply
    7,889.31x = 11,839.23 × 3,272.31
  4. Step 4: Simplify right side
    7,889.31x = 38,741,630.72
  5. Step 5: Solve for x
    x = 38,741,630.72/7,889.31
  6. Step 6: Final answer
    x = 4,910.65

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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.