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Finding the Fourth Proportional to 43.78, 65.66 and 13.34

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Solution

The fourth proportional to 43.78, 65.66 and 13.34 is: 20.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.78 : 65.66 = 13.34 : x
  2. Step 2: Convert to fraction form
    43.78/65.66 = 13.34/x
  3. Step 3: Cross multiply
    43.78x = 65.66 × 13.34
  4. Step 4: Simplify right side
    43.78x = 875.90
  5. Step 5: Solve for x
    x = 875.90/43.78
  6. Step 6: Final answer
    x = 20.01

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