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Finding the Fourth Proportional to 28.51, 42.76 and 14.97

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Solution

The fourth proportional to 28.51, 42.76 and 14.97 is: 22.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.51 : 42.76 = 14.97 : x
  2. Step 2: Convert to fraction form
    28.51/42.76 = 14.97/x
  3. Step 3: Cross multiply
    28.51x = 42.76 × 14.97
  4. Step 4: Simplify right side
    28.51x = 640.30
  5. Step 5: Solve for x
    x = 640.30/28.51
  6. Step 6: Final answer
    x = 22.46

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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.