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Finding the Fourth Proportional to 7,606.58, 11,405.54 and 3,221.78

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Solution

The fourth proportional to 7,606.58, 11,405.54 and 3,221.78 is: 4,830.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,606.58 : 11,405.54 = 3,221.78 : x
  2. Step 2: Convert to fraction form
    7,606.58/11,405.54 = 3,221.78/x
  3. Step 3: Cross multiply
    7,606.58x = 11,405.54 × 3,221.78
  4. Step 4: Simplify right side
    7,606.58x = 36,746,091.69
  5. Step 5: Solve for x
    x = 36,746,091.69/7,606.58
  6. Step 6: Final answer
    x = 4,830.83

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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.