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Finding the Fourth Proportional to 25.18, 34.72 and 16.86

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Solution

The fourth proportional to 25.18, 34.72 and 16.86 is: 23.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.18 : 34.72 = 16.86 : x
  2. Step 2: Convert to fraction form
    25.18/34.72 = 16.86/x
  3. Step 3: Cross multiply
    25.18x = 34.72 × 16.86
  4. Step 4: Simplify right side
    25.18x = 585.46
  5. Step 5: Solve for x
    x = 585.46/25.18
  6. Step 6: Final answer
    x = 23.25

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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.