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Finding the Fourth Proportional to 36.16, 53.96 and 30.76

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Solution

The fourth proportional to 36.16, 53.96 and 30.76 is: 45.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    36.16 : 53.96 = 30.76 : x
  2. Step 2: Convert to fraction form
    36.16/53.96 = 30.76/x
  3. Step 3: Cross multiply
    36.16x = 53.96 × 30.76
  4. Step 4: Simplify right side
    36.16x = 1,659.81
  5. Step 5: Solve for x
    x = 1,659.81/36.16
  6. Step 6: Final answer
    x = 45.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.