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Finding the Fourth Proportional to 27.71, 38.19 and 19.50

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Solution

The fourth proportional to 27.71, 38.19 and 19.50 is: 26.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.71 : 38.19 = 19.50 : x
  2. Step 2: Convert to fraction form
    27.71/38.19 = 19.50/x
  3. Step 3: Cross multiply
    27.71x = 38.19 × 19.50
  4. Step 4: Simplify right side
    27.71x = 744.71
  5. Step 5: Solve for x
    x = 744.71/27.71
  6. Step 6: Final answer
    x = 26.88

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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.