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Finding the Fourth Proportional to 20,622.38, 30,933.56 and 7,474.76

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Solution

The fourth proportional to 20,622.38, 30,933.56 and 7,474.76 is: 11,212.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.38 : 30,933.56 = 7,474.76 : x
  2. Step 2: Convert to fraction form
    20,622.38/30,933.56 = 7,474.76/x
  3. Step 3: Cross multiply
    20,622.38x = 30,933.56 × 7,474.76
  4. Step 4: Simplify right side
    20,622.38x = 231,220,916.97
  5. Step 5: Solve for x
    x = 231,220,916.97/20,622.38
  6. Step 6: Final answer
    x = 11,212.14

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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.