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Finding the Fourth Proportional to 7,959.60, 11,940.21 and 2,412.72

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Solution

The fourth proportional to 7,959.60, 11,940.21 and 2,412.72 is: 3,619.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.60 : 11,940.21 = 2,412.72 : x
  2. Step 2: Convert to fraction form
    7,959.60/11,940.21 = 2,412.72/x
  3. Step 3: Cross multiply
    7,959.60x = 11,940.21 × 2,412.72
  4. Step 4: Simplify right side
    7,959.60x = 28,808,383.47
  5. Step 5: Solve for x
    x = 28,808,383.47/7,959.60
  6. Step 6: Final answer
    x = 3,619.33

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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.