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Finding the Fourth Proportional to 18,968,950.92, 28,453,446.89 and 8,878,657.80

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Solution

The fourth proportional to 18,968,950.92, 28,453,446.89 and 8,878,657.80 is: 13,317,996.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,968,950.92 : 28,453,446.89 = 8,878,657.80 : x
  2. Step 2: Convert to fraction form
    18,968,950.92/28,453,446.89 = 8,878,657.80/x
  3. Step 3: Cross multiply
    18,968,950.92x = 28,453,446.89 × 8,878,657.80
  4. Step 4: Simplify right side
    18,968,950.92x = 252,628,418,046,713.62
  5. Step 5: Solve for x
    x = 252,628,418,046,713.62/18,968,950.92
  6. Step 6: Final answer
    x = 13,317,996.30

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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.