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Finding the Fourth Proportional to 32.36, 48.47 and 20.15

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Solution

The fourth proportional to 32.36, 48.47 and 20.15 is: 30.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    32.36 : 48.47 = 20.15 : x
  2. Step 2: Convert to fraction form
    32.36/48.47 = 20.15/x
  3. Step 3: Cross multiply
    32.36x = 48.47 × 20.15
  4. Step 4: Simplify right side
    32.36x = 976.57
  5. Step 5: Solve for x
    x = 976.57/32.36
  6. Step 6: Final answer
    x = 30.18

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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.