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Finding the Fourth Proportional to 12,704.85, 19,058.19 and 3,940.45

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Solution

The fourth proportional to 12,704.85, 19,058.19 and 3,940.45 is: 5,910.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,704.85 : 19,058.19 = 3,940.45 : x
  2. Step 2: Convert to fraction form
    12,704.85/19,058.19 = 3,940.45/x
  3. Step 3: Cross multiply
    12,704.85x = 19,058.19 × 3,940.45
  4. Step 4: Simplify right side
    12,704.85x = 75,097,782.36
  5. Step 5: Solve for x
    x = 75,097,782.36/12,704.85
  6. Step 6: Final answer
    x = 5,910.95

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1.5x scale

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.