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Finding the Fourth Proportional to 13,379.88, 18,464.91 and 8,074.62

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Solution

The fourth proportional to 13,379.88, 18,464.91 and 8,074.62 is: 11,143.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,379.88 : 18,464.91 = 8,074.62 : x
  2. Step 2: Convert to fraction form
    13,379.88/18,464.91 = 8,074.62/x
  3. Step 3: Cross multiply
    13,379.88x = 18,464.91 × 8,074.62
  4. Step 4: Simplify right side
    13,379.88x = 149,097,131.58
  5. Step 5: Solve for x
    x = 149,097,131.58/13,379.88
  6. Step 6: Final answer
    x = 11,143.38

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1.5x scale

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.