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Finding the Fourth Proportional to 8,680.58, 11,978.74 and 4,851.55

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Solution

The fourth proportional to 8,680.58, 11,978.74 and 4,851.55 is: 6,694.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680.58 : 11,978.74 = 4,851.55 : x
  2. Step 2: Convert to fraction form
    8,680.58/11,978.74 = 4,851.55/x
  3. Step 3: Cross multiply
    8,680.58x = 11,978.74 × 4,851.55
  4. Step 4: Simplify right side
    8,680.58x = 58,115,382.41
  5. Step 5: Solve for x
    x = 58,115,382.41/8,680.58
  6. Step 6: Final answer
    x = 6,694.87

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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.