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Finding the Fourth Proportional to 30,321.39, 45,486.95 and 12,793.80

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Solution

The fourth proportional to 30,321.39, 45,486.95 and 12,793.80 is: 19,192.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,321.39 : 45,486.95 = 12,793.80 : x
  2. Step 2: Convert to fraction form
    30,321.39/45,486.95 = 12,793.80/x
  3. Step 3: Cross multiply
    30,321.39x = 45,486.95 × 12,793.80
  4. Step 4: Simplify right side
    30,321.39x = 581,950,876.94
  5. Step 5: Solve for x
    x = 581,950,876.94/30,321.39
  6. Step 6: Final answer
    x = 19,192.75

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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.