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Finding the Fourth Proportional to 8,940.89, 12,340.70 and 6,109.41

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Solution

The fourth proportional to 8,940.89, 12,340.70 and 6,109.41 is: 8,432.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,940.89 : 12,340.70 = 6,109.41 : x
  2. Step 2: Convert to fraction form
    8,940.89/12,340.70 = 6,109.41/x
  3. Step 3: Cross multiply
    8,940.89x = 12,340.70 × 6,109.41
  4. Step 4: Simplify right side
    8,940.89x = 75,394,395.99
  5. Step 5: Solve for x
    x = 75,394,395.99/8,940.89
  6. Step 6: Final answer
    x = 8,432.54

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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.