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Finding the Fourth Proportional to 13,305,985.65, 19,958,978.48 and 11,962,292.85

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Solution

The fourth proportional to 13,305,985.65, 19,958,978.48 and 11,962,292.85 is: 17,943,439.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,305,985.65 : 19,958,978.48 = 11,962,292.85 : x
  2. Step 2: Convert to fraction form
    13,305,985.65/19,958,978.48 = 11,962,292.85/x
  3. Step 3: Cross multiply
    13,305,985.65x = 19,958,978.48 × 11,962,292.85
  4. Step 4: Simplify right side
    13,305,985.65x = 238,755,145,504,796.41
  5. Step 5: Solve for x
    x = 238,755,145,504,796.41/13,305,985.65
  6. Step 6: Final answer
    x = 17,943,439.28

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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.