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Finding the Fourth Proportional to 20,474.83, 30,706.71 and 8,785.32

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Solution

The fourth proportional to 20,474.83, 30,706.71 and 8,785.32 is: 13,175.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,474.83 : 30,706.71 = 8,785.32 : x
  2. Step 2: Convert to fraction form
    20,474.83/30,706.71 = 8,785.32/x
  3. Step 3: Cross multiply
    20,474.83x = 30,706.71 × 8,785.32
  4. Step 4: Simplify right side
    20,474.83x = 269,768,273.50
  5. Step 5: Solve for x
    x = 269,768,273.50/20,474.83
  6. Step 6: Final answer
    x = 13,175.61

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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.