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Finding the Fourth Proportional to 20,622.54, 30,933.80 and 7,474.89

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Solution

The fourth proportional to 20,622.54, 30,933.80 and 7,474.89 is: 11,212.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.54 : 30,933.80 = 7,474.89 : x
  2. Step 2: Convert to fraction form
    20,622.54/30,933.80 = 7,474.89/x
  3. Step 3: Cross multiply
    20,622.54x = 30,933.80 × 7,474.89
  4. Step 4: Simplify right side
    20,622.54x = 231,226,752.28
  5. Step 5: Solve for x
    x = 231,226,752.28/20,622.54
  6. Step 6: Final answer
    x = 11,212.33

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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.