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Finding the Fourth Proportional to 30,960.49, 42,724.34 and 16,813.03

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Solution

The fourth proportional to 30,960.49, 42,724.34 and 16,813.03 is: 23,201.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,960.49 : 42,724.34 = 16,813.03 : x
  2. Step 2: Convert to fraction form
    30,960.49/42,724.34 = 16,813.03/x
  3. Step 3: Cross multiply
    30,960.49x = 42,724.34 × 16,813.03
  4. Step 4: Simplify right side
    30,960.49x = 718,325,526.09
  5. Step 5: Solve for x
    x = 718,325,526.09/30,960.49
  6. Step 6: Final answer
    x = 23,201.36

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.