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Finding the Fourth Proportional to 18,191,912.80, 27,291,805.80 and 5,413,709.20

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Solution

The fourth proportional to 18,191,912.80, 27,291,805.80 and 5,413,709.20 is: 8,121,735.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,191,912.80 : 27,291,805.80 = 5,413,709.20 : x
  2. Step 2: Convert to fraction form
    18,191,912.80/27,291,805.80 = 5,413,709.20/x
  3. Step 3: Cross multiply
    18,191,912.80x = 27,291,805.80 × 5,413,709.20
  4. Step 4: Simplify right side
    18,191,912.80x = 147,749,900,144,073.38
  5. Step 5: Solve for x
    x = 147,749,900,144,073.38/18,191,912.80
  6. Step 6: Final answer
    x = 8,121,735.29

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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.