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Finding the Fourth Proportional to 8,539.28, 11,759.88 and 7,839.44

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Solution

The fourth proportional to 8,539.28, 11,759.88 and 7,839.44 is: 10,796.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,539.28 : 11,759.88 = 7,839.44 : x
  2. Step 2: Convert to fraction form
    8,539.28/11,759.88 = 7,839.44/x
  3. Step 3: Cross multiply
    8,539.28x = 11,759.88 × 7,839.44
  4. Step 4: Simplify right side
    8,539.28x = 92,190,873.67
  5. Step 5: Solve for x
    x = 92,190,873.67/8,539.28
  6. Step 6: Final answer
    x = 10,796.09

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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.