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Finding the Fourth Proportional to 20,620.71, 30,924.90 and 10,754.61

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Solution

The fourth proportional to 20,620.71, 30,924.90 and 10,754.61 is: 16,128.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.71 : 30,924.90 = 10,754.61 : x
  2. Step 2: Convert to fraction form
    20,620.71/30,924.90 = 10,754.61/x
  3. Step 3: Cross multiply
    20,620.71x = 30,924.90 × 10,754.61
  4. Step 4: Simplify right side
    20,620.71x = 332,585,185.02
  5. Step 5: Solve for x
    x = 332,585,185.02/20,620.71
  6. Step 6: Final answer
    x = 16,128.70

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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.