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Finding the Fourth Proportional to 8,608.56, 12,912.90 and 2,765.40

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Solution

The fourth proportional to 8,608.56, 12,912.90 and 2,765.40 is: 4,148.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,608.56 : 12,912.90 = 2,765.40 : x
  2. Step 2: Convert to fraction form
    8,608.56/12,912.90 = 2,765.40/x
  3. Step 3: Cross multiply
    8,608.56x = 12,912.90 × 2,765.40
  4. Step 4: Simplify right side
    8,608.56x = 35,709,333.66
  5. Step 5: Solve for x
    x = 35,709,333.66/8,608.56
  6. Step 6: Final answer
    x = 4,148.12

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1.5x scale

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.