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Finding the Fourth Proportional to 11,969.90, 17,955.89 and 3,651.79

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Solution

The fourth proportional to 11,969.90, 17,955.89 and 3,651.79 is: 5,478.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,969.90 : 17,955.89 = 3,651.79 : x
  2. Step 2: Convert to fraction form
    11,969.90/17,955.89 = 3,651.79/x
  3. Step 3: Cross multiply
    11,969.90x = 17,955.89 × 3,651.79
  4. Step 4: Simplify right side
    11,969.90x = 65,571,076.39
  5. Step 5: Solve for x
    x = 65,571,076.39/11,969.90
  6. Step 6: Final answer
    x = 5,478.00

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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.