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Finding the Fourth Proportional to 11,979.97, 17,969.99 and 4,186.96

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Solution

The fourth proportional to 11,979.97, 17,969.99 and 4,186.96 is: 6,280.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,979.97 : 17,969.99 = 4,186.96 : x
  2. Step 2: Convert to fraction form
    11,979.97/17,969.99 = 4,186.96/x
  3. Step 3: Cross multiply
    11,979.97x = 17,969.99 × 4,186.96
  4. Step 4: Simplify right side
    11,979.97x = 75,239,563.47
  5. Step 5: Solve for x
    x = 75,239,563.47/11,979.97
  6. Step 6: Final answer
    x = 6,280.45

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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.