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Finding the Fourth Proportional to 25.12, 37.60 and 22.40

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Solution

The fourth proportional to 25.12, 37.60 and 22.40 is: 33.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.12 : 37.60 = 22.40 : x
  2. Step 2: Convert to fraction form
    25.12/37.60 = 22.40/x
  3. Step 3: Cross multiply
    25.12x = 37.60 × 22.40
  4. Step 4: Simplify right side
    25.12x = 842.24
  5. Step 5: Solve for x
    x = 842.24/25.12
  6. Step 6: Final answer
    x = 33.53

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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.