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Finding the Fourth Proportional to 37.07, 51.17 and 20.71

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Solution

The fourth proportional to 37.07, 51.17 and 20.71 is: 28.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    37.07 : 51.17 = 20.71 : x
  2. Step 2: Convert to fraction form
    37.07/51.17 = 20.71/x
  3. Step 3: Cross multiply
    37.07x = 51.17 × 20.71
  4. Step 4: Simplify right side
    37.07x = 1,059.40
  5. Step 5: Solve for x
    x = 1,059.40/37.07
  6. Step 6: Final answer
    x = 28.58

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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.