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Finding the Fourth Proportional to 18,578.57, 25,635.74 and 11,025.21

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Solution

The fourth proportional to 18,578.57, 25,635.74 and 11,025.21 is: 15,213.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,578.57 : 25,635.74 = 11,025.21 : x
  2. Step 2: Convert to fraction form
    18,578.57/25,635.74 = 11,025.21/x
  3. Step 3: Cross multiply
    18,578.57x = 25,635.74 × 11,025.21
  4. Step 4: Simplify right side
    18,578.57x = 282,639,520.03
  5. Step 5: Solve for x
    x = 282,639,520.03/18,578.57
  6. Step 6: Final answer
    x = 15,213.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.