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Finding the Fourth Proportional to 8,616.96, 12,918.24 and 8,208.72

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Solution

The fourth proportional to 8,616.96, 12,918.24 and 8,208.72 is: 12,306.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,616.96 : 12,918.24 = 8,208.72 : x
  2. Step 2: Convert to fraction form
    8,616.96/12,918.24 = 8,208.72/x
  3. Step 3: Cross multiply
    8,616.96x = 12,918.24 × 8,208.72
  4. Step 4: Simplify right side
    8,616.96x = 106,042,215.05
  5. Step 5: Solve for x
    x = 106,042,215.05/8,616.96
  6. Step 6: Final answer
    x = 12,306.22

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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.