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Finding the Fourth Proportional to 8,609.39, 12,913.63 and 2,765.55

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Solution

The fourth proportional to 8,609.39, 12,913.63 and 2,765.55 is: 4,148.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,609.39 : 12,913.63 = 2,765.55 : x
  2. Step 2: Convert to fraction form
    8,609.39/12,913.63 = 2,765.55/x
  3. Step 3: Cross multiply
    8,609.39x = 12,913.63 × 2,765.55
  4. Step 4: Simplify right side
    8,609.39x = 35,713,224.88
  5. Step 5: Solve for x
    x = 35,713,224.88/8,609.39
  6. Step 6: Final answer
    x = 4,148.17

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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.