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Finding the Fourth Proportional to 20,628.06, 30,942.07 and 7,310.81

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Solution

The fourth proportional to 20,628.06, 30,942.07 and 7,310.81 is: 10,966.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,628.06 : 30,942.07 = 7,310.81 : x
  2. Step 2: Convert to fraction form
    20,628.06/30,942.07 = 7,310.81/x
  3. Step 3: Cross multiply
    20,628.06x = 30,942.07 × 7,310.81
  4. Step 4: Simplify right side
    20,628.06x = 226,211,653.85
  5. Step 5: Solve for x
    x = 226,211,653.85/20,628.06
  6. Step 6: Final answer
    x = 10,966.21

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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.