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Finding the Fourth Proportional to 35.59, 53.37 and 20.38

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Solution

The fourth proportional to 35.59, 53.37 and 20.38 is: 30.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.59 : 53.37 = 20.38 : x
  2. Step 2: Convert to fraction form
    35.59/53.37 = 20.38/x
  3. Step 3: Cross multiply
    35.59x = 53.37 × 20.38
  4. Step 4: Simplify right side
    35.59x = 1,087.68
  5. Step 5: Solve for x
    x = 1,087.68/35.59
  6. Step 6: Final answer
    x = 30.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.