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Finding the Fourth Proportional to 18,795,673.16, 28,193,534.48 and 5,148,940.88

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Solution

The fourth proportional to 18,795,673.16, 28,193,534.48 and 5,148,940.88 is: 7,723,418.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,795,673.16 : 28,193,534.48 = 5,148,940.88 : x
  2. Step 2: Convert to fraction form
    18,795,673.16/28,193,534.48 = 5,148,940.88/x
  3. Step 3: Cross multiply
    18,795,673.16x = 28,193,534.48 × 5,148,940.88
  4. Step 4: Simplify right side
    18,795,673.16x = 145,166,842,235,761.53
  5. Step 5: Solve for x
    x = 145,166,842,235,761.53/18,795,673.16
  6. Step 6: Final answer
    x = 7,723,418.10

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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.