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Finding the Fourth Proportional to 18,394.40, 27,583.42 and 5,243.80

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Solution

The fourth proportional to 18,394.40, 27,583.42 and 5,243.80 is: 7,863.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,394.40 : 27,583.42 = 5,243.80 : x
  2. Step 2: Convert to fraction form
    18,394.40/27,583.42 = 5,243.80/x
  3. Step 3: Cross multiply
    18,394.40x = 27,583.42 × 5,243.80
  4. Step 4: Simplify right side
    18,394.40x = 144,641,937.80
  5. Step 5: Solve for x
    x = 144,641,937.80/18,394.40
  6. Step 6: Final answer
    x = 7,863.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.