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Finding the Fourth Proportional to 39.53, 58.94 and 38.12

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Solution

The fourth proportional to 39.53, 58.94 and 38.12 is: 56.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.53 : 58.94 = 38.12 : x
  2. Step 2: Convert to fraction form
    39.53/58.94 = 38.12/x
  3. Step 3: Cross multiply
    39.53x = 58.94 × 38.12
  4. Step 4: Simplify right side
    39.53x = 2,246.45
  5. Step 5: Solve for x
    x = 2,246.45/39.53
  6. Step 6: Final answer
    x = 56.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.