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Finding the Fourth Proportional to 25.47, 35.19 and 18.18

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Solution

The fourth proportional to 25.47, 35.19 and 18.18 is: 25.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.47 : 35.19 = 18.18 : x
  2. Step 2: Convert to fraction form
    25.47/35.19 = 18.18/x
  3. Step 3: Cross multiply
    25.47x = 35.19 × 18.18
  4. Step 4: Simplify right side
    25.47x = 639.75
  5. Step 5: Solve for x
    x = 639.75/25.47
  6. Step 6: Final answer
    x = 25.12

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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.