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Finding the Fourth Proportional to 30.23, 41.72 and 18.58

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Solution

The fourth proportional to 30.23, 41.72 and 18.58 is: 25.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.23 : 41.72 = 18.58 : x
  2. Step 2: Convert to fraction form
    30.23/41.72 = 18.58/x
  3. Step 3: Cross multiply
    30.23x = 41.72 × 18.58
  4. Step 4: Simplify right side
    30.23x = 775.16
  5. Step 5: Solve for x
    x = 775.16/30.23
  6. Step 6: Final answer
    x = 25.65

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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.