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Finding the Fourth Proportional to 12,591,978.16, 18,885,854.20 and 3,494,999.92

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Solution

The fourth proportional to 12,591,978.16, 18,885,854.20 and 3,494,999.92 is: 5,241,913.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,591,978.16 : 18,885,854.20 = 3,494,999.92 : x
  2. Step 2: Convert to fraction form
    12,591,978.16/18,885,854.20 = 3,494,999.92/x
  3. Step 3: Cross multiply
    12,591,978.16x = 18,885,854.20 × 3,494,999.92
  4. Step 4: Simplify right side
    12,591,978.16x = 66,006,058,918,131.66
  5. Step 5: Solve for x
    x = 66,006,058,918,131.66/12,591,978.16
  6. Step 6: Final answer
    x = 5,241,913.39

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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.