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Finding the Fourth Proportional to 8,919.91, 13,369.74 and 3,071.71

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Solution

The fourth proportional to 8,919.91, 13,369.74 and 3,071.71 is: 4,604.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.91 : 13,369.74 = 3,071.71 : x
  2. Step 2: Convert to fraction form
    8,919.91/13,369.74 = 3,071.71/x
  3. Step 3: Cross multiply
    8,919.91x = 13,369.74 × 3,071.71
  4. Step 4: Simplify right side
    8,919.91x = 41,067,964.06
  5. Step 5: Solve for x
    x = 41,067,964.06/8,919.91
  6. Step 6: Final answer
    x = 4,604.08

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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.