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Finding the Fourth Proportional to 21,790.98, 30,072.87 and 12,234

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Solution

The fourth proportional to 21,790.98, 30,072.87 and 12,234 is: 16,883.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,790.98 : 30,072.87 = 12,234 : x
  2. Step 2: Convert to fraction form
    21,790.98/30,072.87 = 12,234/x
  3. Step 3: Cross multiply
    21,790.98x = 30,072.87 × 12,234
  4. Step 4: Simplify right side
    21,790.98x = 367,911,491.58
  5. Step 5: Solve for x
    x = 367,911,491.58/21,790.98
  6. Step 6: Final answer
    x = 16,883.66

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.