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Finding the Fourth Proportional to 8,968.86, 13,458.90 and 3,422.68

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Solution

The fourth proportional to 8,968.86, 13,458.90 and 3,422.68 is: 5,136.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,968.86 : 13,458.90 = 3,422.68 : x
  2. Step 2: Convert to fraction form
    8,968.86/13,458.90 = 3,422.68/x
  3. Step 3: Cross multiply
    8,968.86x = 13,458.90 × 3,422.68
  4. Step 4: Simplify right side
    8,968.86x = 46,065,507.85
  5. Step 5: Solve for x
    x = 46,065,507.85/8,968.86
  6. Step 6: Final answer
    x = 5,136.16

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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.