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Finding the Fourth Proportional to 7,833.60, 11,739.72 and 3,940.68

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Solution

The fourth proportional to 7,833.60, 11,739.72 and 3,940.68 is: 5,905.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,833.60 : 11,739.72 = 3,940.68 : x
  2. Step 2: Convert to fraction form
    7,833.60/11,739.72 = 3,940.68/x
  3. Step 3: Cross multiply
    7,833.60x = 11,739.72 × 3,940.68
  4. Step 4: Simplify right side
    7,833.60x = 46,262,479.81
  5. Step 5: Solve for x
    x = 46,262,479.81/7,833.60
  6. Step 6: Final answer
    x = 5,905.65

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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.