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Finding the Fourth Proportional to 7,839.62, 11,759.79 and 2,645.54

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Solution

The fourth proportional to 7,839.62, 11,759.79 and 2,645.54 is: 3,968.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,839.62 : 11,759.79 = 2,645.54 : x
  2. Step 2: Convert to fraction form
    7,839.62/11,759.79 = 2,645.54/x
  3. Step 3: Cross multiply
    7,839.62x = 11,759.79 × 2,645.54
  4. Step 4: Simplify right side
    7,839.62x = 31,110,994.84
  5. Step 5: Solve for x
    x = 31,110,994.84/7,839.62
  6. Step 6: Final answer
    x = 3,968.43

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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.