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Finding the Fourth Proportional to 8,609.12, 12,914.40 and 2,765.84

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Solution

The fourth proportional to 8,609.12, 12,914.40 and 2,765.84 is: 4,148.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,609.12 : 12,914.40 = 2,765.84 : x
  2. Step 2: Convert to fraction form
    8,609.12/12,914.40 = 2,765.84/x
  3. Step 3: Cross multiply
    8,609.12x = 12,914.40 × 2,765.84
  4. Step 4: Simplify right side
    8,609.12x = 35,719,164.10
  5. Step 5: Solve for x
    x = 35,719,164.10/8,609.12
  6. Step 6: Final answer
    x = 4,148.99

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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.