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Finding the Fourth Proportional to 25.72, 38.57 and 16.76

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Solution

The fourth proportional to 25.72, 38.57 and 16.76 is: 25.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.72 : 38.57 = 16.76 : x
  2. Step 2: Convert to fraction form
    25.72/38.57 = 16.76/x
  3. Step 3: Cross multiply
    25.72x = 38.57 × 16.76
  4. Step 4: Simplify right side
    25.72x = 646.43
  5. Step 5: Solve for x
    x = 646.43/25.72
  6. Step 6: Final answer
    x = 25.13

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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.