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Finding the Fourth Proportional to 8,616.36, 12,912.18 and 4,910.94

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Solution

The fourth proportional to 8,616.36, 12,912.18 and 4,910.94 is: 7,359.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,616.36 : 12,912.18 = 4,910.94 : x
  2. Step 2: Convert to fraction form
    8,616.36/12,912.18 = 4,910.94/x
  3. Step 3: Cross multiply
    8,616.36x = 12,912.18 × 4,910.94
  4. Step 4: Simplify right side
    8,616.36x = 63,410,941.25
  5. Step 5: Solve for x
    x = 63,410,941.25/8,616.36
  6. Step 6: Final answer
    x = 7,359.37

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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.