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Finding the Fourth Proportional to 20,634.54, 30,953.87 and 7,487.94

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Solution

The fourth proportional to 20,634.54, 30,953.87 and 7,487.94 is: 11,232.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,634.54 : 30,953.87 = 7,487.94 : x
  2. Step 2: Convert to fraction form
    20,634.54/30,953.87 = 7,487.94/x
  3. Step 3: Cross multiply
    20,634.54x = 30,953.87 × 7,487.94
  4. Step 4: Simplify right side
    20,634.54x = 231,780,721.33
  5. Step 5: Solve for x
    x = 231,780,721.33/20,634.54
  6. Step 6: Final answer
    x = 11,232.66

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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.