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Finding the Fourth Proportional to 8,651.63, 12,968.21 and 3,721.65

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Solution

The fourth proportional to 8,651.63, 12,968.21 and 3,721.65 is: 5,578.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,651.63 : 12,968.21 = 3,721.65 : x
  2. Step 2: Convert to fraction form
    8,651.63/12,968.21 = 3,721.65/x
  3. Step 3: Cross multiply
    8,651.63x = 12,968.21 × 3,721.65
  4. Step 4: Simplify right side
    8,651.63x = 48,263,120.14
  5. Step 5: Solve for x
    x = 48,263,120.14/8,651.63
  6. Step 6: Final answer
    x = 5,578.50

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1.5x scale

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.