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Finding the Fourth Proportional to 27.03, 36.78 and 26.90

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Solution

The fourth proportional to 27.03, 36.78 and 26.90 is: 36.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.03 : 36.78 = 26.90 : x
  2. Step 2: Convert to fraction form
    27.03/36.78 = 26.90/x
  3. Step 3: Cross multiply
    27.03x = 36.78 × 26.90
  4. Step 4: Simplify right side
    27.03x = 989.20
  5. Step 5: Solve for x
    x = 989.20/27.03
  6. Step 6: Final answer
    x = 36.60

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.