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Finding the Fourth Proportional to 20,633.67, 30,936.77 and 7,484.34

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Solution

The fourth proportional to 20,633.67, 30,936.77 and 7,484.34 is: 11,221.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,633.67 : 30,936.77 = 7,484.34 : x
  2. Step 2: Convert to fraction form
    20,633.67/30,936.77 = 7,484.34/x
  3. Step 3: Cross multiply
    20,633.67x = 30,936.77 × 7,484.34
  4. Step 4: Simplify right side
    20,633.67x = 231,541,305.18
  5. Step 5: Solve for x
    x = 231,541,305.18/20,633.67
  6. Step 6: Final answer
    x = 11,221.53

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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.