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Finding the Fourth Proportional to 25.30, 34.86 and 23.86

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Solution

The fourth proportional to 25.30, 34.86 and 23.86 is: 32.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.30 : 34.86 = 23.86 : x
  2. Step 2: Convert to fraction form
    25.30/34.86 = 23.86/x
  3. Step 3: Cross multiply
    25.30x = 34.86 × 23.86
  4. Step 4: Simplify right side
    25.30x = 831.76
  5. Step 5: Solve for x
    x = 831.76/25.30
  6. Step 6: Final answer
    x = 32.88

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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.