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Finding the Fourth Proportional to 25.99, 39.18 and 23.18

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Solution

The fourth proportional to 25.99, 39.18 and 23.18 is: 34.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.99 : 39.18 = 23.18 : x
  2. Step 2: Convert to fraction form
    25.99/39.18 = 23.18/x
  3. Step 3: Cross multiply
    25.99x = 39.18 × 23.18
  4. Step 4: Simplify right side
    25.99x = 908.08
  5. Step 5: Solve for x
    x = 908.08/25.99
  6. Step 6: Final answer
    x = 34.94

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.