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Finding the Fourth Proportional to 38.93, 53.70 and 25.11

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Solution

The fourth proportional to 38.93, 53.70 and 25.11 is: 34.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.93 : 53.70 = 25.11 : x
  2. Step 2: Convert to fraction form
    38.93/53.70 = 25.11/x
  3. Step 3: Cross multiply
    38.93x = 53.70 × 25.11
  4. Step 4: Simplify right side
    38.93x = 1,348.41
  5. Step 5: Solve for x
    x = 1,348.41/38.93
  6. Step 6: Final answer
    x = 34.64

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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.