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Finding the Fourth Proportional to 8,616.62, 11,890.83 and 4,890.38

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Solution

The fourth proportional to 8,616.62, 11,890.83 and 4,890.38 is: 6,748.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,616.62 : 11,890.83 = 4,890.38 : x
  2. Step 2: Convert to fraction form
    8,616.62/11,890.83 = 4,890.38/x
  3. Step 3: Cross multiply
    8,616.62x = 11,890.83 × 4,890.38
  4. Step 4: Simplify right side
    8,616.62x = 58,150,677.22
  5. Step 5: Solve for x
    x = 58,150,677.22/8,616.62
  6. Step 6: Final answer
    x = 6,748.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.