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Finding the Fourth Proportional to 8,790.88, 12,131.31 and 4,811.94

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Solution

The fourth proportional to 8,790.88, 12,131.31 and 4,811.94 is: 6,640.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,790.88 : 12,131.31 = 4,811.94 : x
  2. Step 2: Convert to fraction form
    8,790.88/12,131.31 = 4,811.94/x
  3. Step 3: Cross multiply
    8,790.88x = 12,131.31 × 4,811.94
  4. Step 4: Simplify right side
    8,790.88x = 58,375,135.84
  5. Step 5: Solve for x
    x = 58,375,135.84/8,790.88
  6. Step 6: Final answer
    x = 6,640.42

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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.