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Finding the Fourth Proportional to 8,766.58, 12,098.91 and 4,990.65

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Solution

The fourth proportional to 8,766.58, 12,098.91 and 4,990.65 is: 6,887.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,766.58 : 12,098.91 = 4,990.65 : x
  2. Step 2: Convert to fraction form
    8,766.58/12,098.91 = 4,990.65/x
  3. Step 3: Cross multiply
    8,766.58x = 12,098.91 × 4,990.65
  4. Step 4: Simplify right side
    8,766.58x = 60,381,364.70
  5. Step 5: Solve for x
    x = 60,381,364.70/8,766.58
  6. Step 6: Final answer
    x = 6,887.68

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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.