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Finding the Fourth Proportional to 12,844.95, 17,729.79 and 8,131.95

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Solution

The fourth proportional to 12,844.95, 17,729.79 and 8,131.95 is: 11,224.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,844.95 : 17,729.79 = 8,131.95 : x
  2. Step 2: Convert to fraction form
    12,844.95/17,729.79 = 8,131.95/x
  3. Step 3: Cross multiply
    12,844.95x = 17,729.79 × 8,131.95
  4. Step 4: Simplify right side
    12,844.95x = 144,177,765.79
  5. Step 5: Solve for x
    x = 144,177,765.79/12,844.95
  6. Step 6: Final answer
    x = 11,224.47

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1.5x scale

Why These Related Problems?

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