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Finding the Fourth Proportional to 18,907,404.30, 28,361,106.45 and 18,078,093.90

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Solution

The fourth proportional to 18,907,404.30, 28,361,106.45 and 18,078,093.90 is: 27,117,140.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907,404.30 : 28,361,106.45 = 18,078,093.90 : x
  2. Step 2: Convert to fraction form
    18,907,404.30/28,361,106.45 = 18,078,093.90/x
  3. Step 3: Cross multiply
    18,907,404.30x = 28,361,106.45 × 18,078,093.90
  4. Step 4: Simplify right side
    18,907,404.30x = 512,714,745,510,995.62
  5. Step 5: Solve for x
    x = 512,714,745,510,995.62/18,907,404.30
  6. Step 6: Final answer
    x = 27,117,140.85

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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.