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Finding the Fourth Proportional to 18,736.46, 28,107.74 and 8,751.19

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Solution

The fourth proportional to 18,736.46, 28,107.74 and 8,751.19 is: 13,128.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,736.46 : 28,107.74 = 8,751.19 : x
  2. Step 2: Convert to fraction form
    18,736.46/28,107.74 = 8,751.19/x
  3. Step 3: Cross multiply
    18,736.46x = 28,107.74 × 8,751.19
  4. Step 4: Simplify right side
    18,736.46x = 245,976,173.21
  5. Step 5: Solve for x
    x = 245,976,173.21/18,736.46
  6. Step 6: Final answer
    x = 13,128.21

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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.