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Finding the Fourth Proportional to 8,865.66, 12,234.55 and 4,886.78

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Solution

The fourth proportional to 8,865.66, 12,234.55 and 4,886.78 is: 6,743.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,865.66 : 12,234.55 = 4,886.78 : x
  2. Step 2: Convert to fraction form
    8,865.66/12,234.55 = 4,886.78/x
  3. Step 3: Cross multiply
    8,865.66x = 12,234.55 × 4,886.78
  4. Step 4: Simplify right side
    8,865.66x = 59,787,468.64
  5. Step 5: Solve for x
    x = 59,787,468.64/8,865.66
  6. Step 6: Final answer
    x = 6,743.71

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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.