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Finding the Fourth Proportional to 18,378.25, 27,520.43 and 12,119.36

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Solution

The fourth proportional to 18,378.25, 27,520.43 and 12,119.36 is: 18,148.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378.25 : 27,520.43 = 12,119.36 : x
  2. Step 2: Convert to fraction form
    18,378.25/27,520.43 = 12,119.36/x
  3. Step 3: Cross multiply
    18,378.25x = 27,520.43 × 12,119.36
  4. Step 4: Simplify right side
    18,378.25x = 333,529,800.33
  5. Step 5: Solve for x
    x = 333,529,800.33/18,378.25
  6. Step 6: Final answer
    x = 18,148.07

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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.