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Finding the Fourth Proportional to 36.53, 54.76 and 19.40

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Solution

The fourth proportional to 36.53, 54.76 and 19.40 is: 29.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    36.53 : 54.76 = 19.40 : x
  2. Step 2: Convert to fraction form
    36.53/54.76 = 19.40/x
  3. Step 3: Cross multiply
    36.53x = 54.76 × 19.40
  4. Step 4: Simplify right side
    36.53x = 1,062.52
  5. Step 5: Solve for x
    x = 1,062.52/36.53
  6. Step 6: Final answer
    x = 29.08

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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.