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Finding the Fourth Proportional to 28.65, 39.55 and 17.58

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Solution

The fourth proportional to 28.65, 39.55 and 17.58 is: 24.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.65 : 39.55 = 17.58 : x
  2. Step 2: Convert to fraction form
    28.65/39.55 = 17.58/x
  3. Step 3: Cross multiply
    28.65x = 39.55 × 17.58
  4. Step 4: Simplify right side
    28.65x = 695.38
  5. Step 5: Solve for x
    x = 695.38/28.65
  6. Step 6: Final answer
    x = 24.27

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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.