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Finding the Fourth Proportional to 28.71, 39.58 and 23.55

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Solution

The fourth proportional to 28.71, 39.58 and 23.55 is: 32.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.71 : 39.58 = 23.55 : x
  2. Step 2: Convert to fraction form
    28.71/39.58 = 23.55/x
  3. Step 3: Cross multiply
    28.71x = 39.58 × 23.55
  4. Step 4: Simplify right side
    28.71x = 932.11
  5. Step 5: Solve for x
    x = 932.11/28.71
  6. Step 6: Final answer
    x = 32.47

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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.