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Finding the Fourth Proportional to 12,978,103.18, 19,467,220.30 and 3,393,502.78

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Solution

The fourth proportional to 12,978,103.18, 19,467,220.30 and 3,393,502.78 is: 5,090,271.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,978,103.18 : 19,467,220.30 = 3,393,502.78 : x
  2. Step 2: Convert to fraction form
    12,978,103.18/19,467,220.30 = 3,393,502.78/x
  3. Step 3: Cross multiply
    12,978,103.18x = 19,467,220.30 × 3,393,502.78
  4. Step 4: Simplify right side
    12,978,103.18x = 66,062,066,206,922.43
  5. Step 5: Solve for x
    x = 66,062,066,206,922.43/12,978,103.18
  6. Step 6: Final answer
    x = 5,090,271.30

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.