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Finding the Fourth Proportional to 32.80, 45.21 and 23.08

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Solution

The fourth proportional to 32.80, 45.21 and 23.08 is: 31.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    32.80 : 45.21 = 23.08 : x
  2. Step 2: Convert to fraction form
    32.80/45.21 = 23.08/x
  3. Step 3: Cross multiply
    32.80x = 45.21 × 23.08
  4. Step 4: Simplify right side
    32.80x = 1,043.45
  5. Step 5: Solve for x
    x = 1,043.45/32.80
  6. Step 6: Final answer
    x = 31.81

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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.