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Finding the Fourth Proportional to 8,680.44, 13,012.41 and 7,884.90

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Solution

The fourth proportional to 8,680.44, 13,012.41 and 7,884.90 is: 11,819.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680.44 : 13,012.41 = 7,884.90 : x
  2. Step 2: Convert to fraction form
    8,680.44/13,012.41 = 7,884.90/x
  3. Step 3: Cross multiply
    8,680.44x = 13,012.41 × 7,884.90
  4. Step 4: Simplify right side
    8,680.44x = 102,601,551.61
  5. Step 5: Solve for x
    x = 102,601,551.61/8,680.44
  6. Step 6: Final answer
    x = 11,819.86

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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.