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Finding the Fourth Proportional to 7,618.64, 11,425.11 and 2,619.59

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Solution

The fourth proportional to 7,618.64, 11,425.11 and 2,619.59 is: 3,928.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,618.64 : 11,425.11 = 2,619.59 : x
  2. Step 2: Convert to fraction form
    7,618.64/11,425.11 = 2,619.59/x
  3. Step 3: Cross multiply
    7,618.64x = 11,425.11 × 2,619.59
  4. Step 4: Simplify right side
    7,618.64x = 29,929,158.80
  5. Step 5: Solve for x
    x = 29,929,158.80/7,618.64
  6. Step 6: Final answer
    x = 3,928.41

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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.