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Finding the Fourth Proportional to 8,978.51, 13,462.26 and 3,425.90

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Solution

The fourth proportional to 8,978.51, 13,462.26 and 3,425.90 is: 5,136.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,978.51 : 13,462.26 = 3,425.90 : x
  2. Step 2: Convert to fraction form
    8,978.51/13,462.26 = 3,425.90/x
  3. Step 3: Cross multiply
    8,978.51x = 13,462.26 × 3,425.90
  4. Step 4: Simplify right side
    8,978.51x = 46,120,356.53
  5. Step 5: Solve for x
    x = 46,120,356.53/8,978.51
  6. Step 6: Final answer
    x = 5,136.75

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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.