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Finding the Fourth Proportional to 28.16, 42.36 and 17.48

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Solution

The fourth proportional to 28.16, 42.36 and 17.48 is: 26.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.16 : 42.36 = 17.48 : x
  2. Step 2: Convert to fraction form
    28.16/42.36 = 17.48/x
  3. Step 3: Cross multiply
    28.16x = 42.36 × 17.48
  4. Step 4: Simplify right side
    28.16x = 740.45
  5. Step 5: Solve for x
    x = 740.45/28.16
  6. Step 6: Final answer
    x = 26.29

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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.