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Finding the Fourth Proportional to 25.32, 38 and 13.12

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Solution

The fourth proportional to 25.32, 38 and 13.12 is: 19.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.32 : 38 = 13.12 : x
  2. Step 2: Convert to fraction form
    25.32/38 = 13.12/x
  3. Step 3: Cross multiply
    25.32x = 38 × 13.12
  4. Step 4: Simplify right side
    25.32x = 498.56
  5. Step 5: Solve for x
    x = 498.56/25.32
  6. Step 6: Final answer
    x = 19.69

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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.