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Finding the Fourth Proportional to 30,955.68, 42,718.92 and 16,808.40

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Solution

The fourth proportional to 30,955.68, 42,718.92 and 16,808.40 is: 23,195.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,955.68 : 42,718.92 = 16,808.40 : x
  2. Step 2: Convert to fraction form
    30,955.68/42,718.92 = 16,808.40/x
  3. Step 3: Cross multiply
    30,955.68x = 42,718.92 × 16,808.40
  4. Step 4: Simplify right side
    30,955.68x = 718,036,694.93
  5. Step 5: Solve for x
    x = 718,036,694.93/30,955.68
  6. Step 6: Final answer
    x = 23,195.64

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