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Finding the Fourth Proportional to 18,168, 27,237.28 and 5,681.60

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Solution

The fourth proportional to 18,168, 27,237.28 and 5,681.60 is: 8,517.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,168 : 27,237.28 = 5,681.60 : x
  2. Step 2: Convert to fraction form
    18,168/27,237.28 = 5,681.60/x
  3. Step 3: Cross multiply
    18,168x = 27,237.28 × 5,681.60
  4. Step 4: Simplify right side
    18,168x = 154,751,330.05
  5. Step 5: Solve for x
    x = 154,751,330.05/18,168
  6. Step 6: Final answer
    x = 8,517.80

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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.