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Finding the Fourth Proportional to 39.74, 55.04 and 37.13

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Solution

The fourth proportional to 39.74, 55.04 and 37.13 is: 51.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.74 : 55.04 = 37.13 : x
  2. Step 2: Convert to fraction form
    39.74/55.04 = 37.13/x
  3. Step 3: Cross multiply
    39.74x = 55.04 × 37.13
  4. Step 4: Simplify right side
    39.74x = 2,043.17
  5. Step 5: Solve for x
    x = 2,043.17/39.74
  6. Step 6: Final answer
    x = 51.42

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.