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Finding the Fourth Proportional to 11,891.88, 16,395.60 and 9,759.60

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Solution

The fourth proportional to 11,891.88, 16,395.60 and 9,759.60 is: 13,455.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,891.88 : 16,395.60 = 9,759.60 : x
  2. Step 2: Convert to fraction form
    11,891.88/16,395.60 = 9,759.60/x
  3. Step 3: Cross multiply
    11,891.88x = 16,395.60 × 9,759.60
  4. Step 4: Simplify right side
    11,891.88x = 160,014,497.76
  5. Step 5: Solve for x
    x = 160,014,497.76/11,891.88
  6. Step 6: Final answer
    x = 13,455.78

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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.