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Finding the Fourth Proportional to 28.41, 39.15 and 26.34

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Solution

The fourth proportional to 28.41, 39.15 and 26.34 is: 36.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.41 : 39.15 = 26.34 : x
  2. Step 2: Convert to fraction form
    28.41/39.15 = 26.34/x
  3. Step 3: Cross multiply
    28.41x = 39.15 × 26.34
  4. Step 4: Simplify right side
    28.41x = 1,031.21
  5. Step 5: Solve for x
    x = 1,031.21/28.41
  6. Step 6: Final answer
    x = 36.30

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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.