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Finding the Fourth Proportional to 12,940.00, 19,314 and 11,153.41

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Solution

The fourth proportional to 12,940.00, 19,314 and 11,153.41 is: 16,647.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,940.00 : 19,314 = 11,153.41 : x
  2. Step 2: Convert to fraction form
    12,940.00/19,314 = 11,153.41/x
  3. Step 3: Cross multiply
    12,940.00x = 19,314 × 11,153.41
  4. Step 4: Simplify right side
    12,940.00x = 215,416,912.46
  5. Step 5: Solve for x
    x = 215,416,912.46/12,940.00
  6. Step 6: Final answer
    x = 16,647.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.