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Finding the Fourth Proportional to 8,466.51, 12,696.96 and 2,919.72

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Solution

The fourth proportional to 8,466.51, 12,696.96 and 2,919.72 is: 4,378.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,466.51 : 12,696.96 = 2,919.72 : x
  2. Step 2: Convert to fraction form
    8,466.51/12,696.96 = 2,919.72/x
  3. Step 3: Cross multiply
    8,466.51x = 12,696.96 × 2,919.72
  4. Step 4: Simplify right side
    8,466.51x = 37,071,568.05
  5. Step 5: Solve for x
    x = 37,071,568.05/8,466.51
  6. Step 6: Final answer
    x = 4,378.61

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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.