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Finding the Fourth Proportional to 18,125.94, 27,189.21 and 4,978.23

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Solution

The fourth proportional to 18,125.94, 27,189.21 and 4,978.23 is: 7,467.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,125.94 : 27,189.21 = 4,978.23 : x
  2. Step 2: Convert to fraction form
    18,125.94/27,189.21 = 4,978.23/x
  3. Step 3: Cross multiply
    18,125.94x = 27,189.21 × 4,978.23
  4. Step 4: Simplify right side
    18,125.94x = 135,354,140.90
  5. Step 5: Solve for x
    x = 135,354,140.90/18,125.94
  6. Step 6: Final answer
    x = 7,467.43

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1.5x scale

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.