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Finding the Fourth Proportional to 27.90, 41.86 and 19.36

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Solution

The fourth proportional to 27.90, 41.86 and 19.36 is: 29.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.90 : 41.86 = 19.36 : x
  2. Step 2: Convert to fraction form
    27.90/41.86 = 19.36/x
  3. Step 3: Cross multiply
    27.90x = 41.86 × 19.36
  4. Step 4: Simplify right side
    27.90x = 810.41
  5. Step 5: Solve for x
    x = 810.41/27.90
  6. Step 6: Final answer
    x = 29.05

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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.