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Finding the Fourth Proportional to 18,090.78, 27,133.05 and 4,940.04

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Solution

The fourth proportional to 18,090.78, 27,133.05 and 4,940.04 is: 7,409.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,090.78 : 27,133.05 = 4,940.04 : x
  2. Step 2: Convert to fraction form
    18,090.78/27,133.05 = 4,940.04/x
  3. Step 3: Cross multiply
    18,090.78x = 27,133.05 × 4,940.04
  4. Step 4: Simplify right side
    18,090.78x = 134,038,352.32
  5. Step 5: Solve for x
    x = 134,038,352.32/18,090.78
  6. Step 6: Final answer
    x = 7,409.21

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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.