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Finding the Fourth Proportional to 7,470.78, 11,206.17 and 2,540.94

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Solution

The fourth proportional to 7,470.78, 11,206.17 and 2,540.94 is: 3,811.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,470.78 : 11,206.17 = 2,540.94 : x
  2. Step 2: Convert to fraction form
    7,470.78/11,206.17 = 2,540.94/x
  3. Step 3: Cross multiply
    7,470.78x = 11,206.17 × 2,540.94
  4. Step 4: Simplify right side
    7,470.78x = 28,474,205.60
  5. Step 5: Solve for x
    x = 28,474,205.60/7,470.78
  6. Step 6: Final answer
    x = 3,811.41

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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.