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Finding the Fourth Proportional to 28.45, 39.09 and 25.37

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Solution

The fourth proportional to 28.45, 39.09 and 25.37 is: 34.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.45 : 39.09 = 25.37 : x
  2. Step 2: Convert to fraction form
    28.45/39.09 = 25.37/x
  3. Step 3: Cross multiply
    28.45x = 39.09 × 25.37
  4. Step 4: Simplify right side
    28.45x = 991.71
  5. Step 5: Solve for x
    x = 991.71/28.45
  6. Step 6: Final answer
    x = 34.86

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.