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Finding the Fourth Proportional to 18,090, 27,138.08 and 6,240.56

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Solution

The fourth proportional to 18,090, 27,138.08 and 6,240.56 is: 9,361.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,090 : 27,138.08 = 6,240.56 : x
  2. Step 2: Convert to fraction form
    18,090/27,138.08 = 6,240.56/x
  3. Step 3: Cross multiply
    18,090x = 27,138.08 × 6,240.56
  4. Step 4: Simplify right side
    18,090x = 169,356,649.63
  5. Step 5: Solve for x
    x = 169,356,649.63/18,090
  6. Step 6: Final answer
    x = 9,361.89

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