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Finding the Fourth Proportional to 8,607.42, 12,912.75 and 2,763.54

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Solution

The fourth proportional to 8,607.42, 12,912.75 and 2,763.54 is: 4,145.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,607.42 : 12,912.75 = 2,763.54 : x
  2. Step 2: Convert to fraction form
    8,607.42/12,912.75 = 2,763.54/x
  3. Step 3: Cross multiply
    8,607.42x = 12,912.75 × 2,763.54
  4. Step 4: Simplify right side
    8,607.42x = 35,684,901.14
  5. Step 5: Solve for x
    x = 35,684,901.14/8,607.42
  6. Step 6: Final answer
    x = 4,145.83

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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.