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Finding the Fourth Proportional to 44,578.44, 66,879.27 and 12,987.78

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Solution

The fourth proportional to 44,578.44, 66,879.27 and 12,987.78 is: 19,485.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    44,578.44 : 66,879.27 = 12,987.78 : x
  2. Step 2: Convert to fraction form
    44,578.44/66,879.27 = 12,987.78/x
  3. Step 3: Cross multiply
    44,578.44x = 66,879.27 × 12,987.78
  4. Step 4: Simplify right side
    44,578.44x = 868,613,245.32
  5. Step 5: Solve for x
    x = 868,613,245.32/44,578.44
  6. Step 6: Final answer
    x = 19,485.05

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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.