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Finding the Fourth Proportional to 20,505,841.20, 30,758,761.80 and 20,186,976.60

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Solution

The fourth proportional to 20,505,841.20, 30,758,761.80 and 20,186,976.60 is: 30,280,464.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505,841.20 : 30,758,761.80 = 20,186,976.60 : x
  2. Step 2: Convert to fraction form
    20,505,841.20/30,758,761.80 = 20,186,976.60/x
  3. Step 3: Cross multiply
    20,505,841.20x = 30,758,761.80 × 20,186,976.60
  4. Step 4: Simplify right side
    20,505,841.20x = 620,926,404,701,574
  5. Step 5: Solve for x
    x = 620,926,404,701,574/20,505,841.20
  6. Step 6: Final answer
    x = 30,280,464.90

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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.