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Finding the Fourth Proportional to 8,679.64, 13,015.56 and 2,754.85

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Solution

The fourth proportional to 8,679.64, 13,015.56 and 2,754.85 is: 4,131.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.64 : 13,015.56 = 2,754.85 : x
  2. Step 2: Convert to fraction form
    8,679.64/13,015.56 = 2,754.85/x
  3. Step 3: Cross multiply
    8,679.64x = 13,015.56 × 2,754.85
  4. Step 4: Simplify right side
    8,679.64x = 35,855,901.69
  5. Step 5: Solve for x
    x = 35,855,901.69/8,679.64
  6. Step 6: Final answer
    x = 4,131.04

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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.