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Finding the Fourth Proportional to 27.84, 42 and 26.67

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Solution

The fourth proportional to 27.84, 42 and 26.67 is: 40.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.84 : 42 = 26.67 : x
  2. Step 2: Convert to fraction form
    27.84/42 = 26.67/x
  3. Step 3: Cross multiply
    27.84x = 42 × 26.67
  4. Step 4: Simplify right side
    27.84x = 1,120.14
  5. Step 5: Solve for x
    x = 1,120.14/27.84
  6. Step 6: Final answer
    x = 40.23

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.