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Finding the Fourth Proportional to 58, 86.82 and 38.70

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Solution

The fourth proportional to 58, 86.82 and 38.70 is: 57.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    58 : 86.82 = 38.70 : x
  2. Step 2: Convert to fraction form
    58/86.82 = 38.70/x
  3. Step 3: Cross multiply
    58x = 86.82 × 38.70
  4. Step 4: Simplify right side
    58x = 3,359.93
  5. Step 5: Solve for x
    x = 3,359.93/58
  6. Step 6: Final answer
    x = 57.93

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