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Finding the Fourth Proportional to 21,994,821.20, 33,007,978.20 and 12,400,014.80

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Solution

The fourth proportional to 21,994,821.20, 33,007,978.20 and 12,400,014.80 is: 18,608,899.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,994,821.20 : 33,007,978.20 = 12,400,014.80 : x
  2. Step 2: Convert to fraction form
    21,994,821.20/33,007,978.20 = 12,400,014.80/x
  3. Step 3: Cross multiply
    21,994,821.20x = 33,007,978.20 × 12,400,014.80
  4. Step 4: Simplify right side
    21,994,821.20x = 409,299,418,198,077.38
  5. Step 5: Solve for x
    x = 409,299,418,198,077.38/21,994,821.20
  6. Step 6: Final answer
    x = 18,608,899.54

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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.