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Finding the Fourth Proportional to 6,479.75, 8,942.51 and 3,647.40

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Solution

The fourth proportional to 6,479.75, 8,942.51 and 3,647.40 is: 5,033.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,479.75 : 8,942.51 = 3,647.40 : x
  2. Step 2: Convert to fraction form
    6,479.75/8,942.51 = 3,647.40/x
  3. Step 3: Cross multiply
    6,479.75x = 8,942.51 × 3,647.40
  4. Step 4: Simplify right side
    6,479.75x = 32,616,886.56
  5. Step 5: Solve for x
    x = 32,616,886.56/6,479.75
  6. Step 6: Final answer
    x = 5,033.66

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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.