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Finding the Fourth Proportional to 22.68, 31.25 and 17.75

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Solution

The fourth proportional to 22.68, 31.25 and 17.75 is: 24.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.68 : 31.25 = 17.75 : x
  2. Step 2: Convert to fraction form
    22.68/31.25 = 17.75/x
  3. Step 3: Cross multiply
    22.68x = 31.25 × 17.75
  4. Step 4: Simplify right side
    22.68x = 554.81
  5. Step 5: Solve for x
    x = 554.81/22.68
  6. Step 6: Final answer
    x = 24.46

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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.