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Finding the Fourth Proportional to 19,319,231.80, 28,978,847.70 and 10,361,279.80

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Solution

The fourth proportional to 19,319,231.80, 28,978,847.70 and 10,361,279.80 is: 15,541,919.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,319,231.80 : 28,978,847.70 = 10,361,279.80 : x
  2. Step 2: Convert to fraction form
    19,319,231.80/28,978,847.70 = 10,361,279.80/x
  3. Step 3: Cross multiply
    19,319,231.80x = 28,978,847.70 × 10,361,279.80
  4. Step 4: Simplify right side
    19,319,231.80x = 300,257,949,301,286.50
  5. Step 5: Solve for x
    x = 300,257,949,301,286.50/19,319,231.80
  6. Step 6: Final answer
    x = 15,541,919.70

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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.