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Finding the Fourth Proportional to 11,969.60, 17,993.28 and 11,911.28

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Solution

The fourth proportional to 11,969.60, 17,993.28 and 11,911.28 is: 17,905.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,969.60 : 17,993.28 = 11,911.28 : x
  2. Step 2: Convert to fraction form
    11,969.60/17,993.28 = 11,911.28/x
  3. Step 3: Cross multiply
    11,969.60x = 17,993.28 × 11,911.28
  4. Step 4: Simplify right side
    11,969.60x = 214,322,996.20
  5. Step 5: Solve for x
    x = 214,322,996.20/11,969.60
  6. Step 6: Final answer
    x = 17,905.61

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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.