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Finding the Fourth Proportional to 8,756.86, 12,084.48 and 4,979.93

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Solution

The fourth proportional to 8,756.86, 12,084.48 and 4,979.93 is: 6,872.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,756.86 : 12,084.48 = 4,979.93 : x
  2. Step 2: Convert to fraction form
    8,756.86/12,084.48 = 4,979.93/x
  3. Step 3: Cross multiply
    8,756.86x = 12,084.48 × 4,979.93
  4. Step 4: Simplify right side
    8,756.86x = 60,179,846.73
  5. Step 5: Solve for x
    x = 60,179,846.73/8,756.86
  6. Step 6: Final answer
    x = 6,872.31

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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.