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Finding the Fourth Proportional to 21,672.15, 32,512.82 and 7,631.61

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Solution

The fourth proportional to 21,672.15, 32,512.82 and 7,631.61 is: 11,449.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,672.15 : 32,512.82 = 7,631.61 : x
  2. Step 2: Convert to fraction form
    21,672.15/32,512.82 = 7,631.61/x
  3. Step 3: Cross multiply
    21,672.15x = 32,512.82 × 7,631.61
  4. Step 4: Simplify right side
    21,672.15x = 248,125,162.24
  5. Step 5: Solve for x
    x = 248,125,162.24/21,672.15
  6. Step 6: Final answer
    x = 11,449.03

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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.