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Finding the Fourth Proportional to 7,859.76, 11,790.99 and 2,664.42

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Solution

The fourth proportional to 7,859.76, 11,790.99 and 2,664.42 is: 3,997.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,859.76 : 11,790.99 = 2,664.42 : x
  2. Step 2: Convert to fraction form
    7,859.76/11,790.99 = 2,664.42/x
  3. Step 3: Cross multiply
    7,859.76x = 11,790.99 × 2,664.42
  4. Step 4: Simplify right side
    7,859.76x = 31,416,149.58
  5. Step 5: Solve for x
    x = 31,416,149.58/7,859.76
  6. Step 6: Final answer
    x = 3,997.09

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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.