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Finding the Fourth Proportional to 33.02, 45.57 and 21.37

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Solution

The fourth proportional to 33.02, 45.57 and 21.37 is: 29.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.02 : 45.57 = 21.37 : x
  2. Step 2: Convert to fraction form
    33.02/45.57 = 21.37/x
  3. Step 3: Cross multiply
    33.02x = 45.57 × 21.37
  4. Step 4: Simplify right side
    33.02x = 973.50
  5. Step 5: Solve for x
    x = 973.50/33.02
  6. Step 6: Final answer
    x = 29.48

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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.