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Finding the Fourth Proportional to 27,879.12, 38,443.68 and 19,918.44

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Solution

The fourth proportional to 27,879.12, 38,443.68 and 19,918.44 is: 27,466.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,879.12 : 38,443.68 = 19,918.44 : x
  2. Step 2: Convert to fraction form
    27,879.12/38,443.68 = 19,918.44/x
  3. Step 3: Cross multiply
    27,879.12x = 38,443.68 × 19,918.44
  4. Step 4: Simplify right side
    27,879.12x = 765,738,133.46
  5. Step 5: Solve for x
    x = 765,738,133.46/27,879.12
  6. Step 6: Final answer
    x = 27,466.37

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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.