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Finding the Fourth Proportional to 18,757.61, 28,144.31 and 8,222.19

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Solution

The fourth proportional to 18,757.61, 28,144.31 and 8,222.19 is: 12,336.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,757.61 : 28,144.31 = 8,222.19 : x
  2. Step 2: Convert to fraction form
    18,757.61/28,144.31 = 8,222.19/x
  3. Step 3: Cross multiply
    18,757.61x = 28,144.31 × 8,222.19
  4. Step 4: Simplify right side
    18,757.61x = 231,407,955.16
  5. Step 5: Solve for x
    x = 231,407,955.16/18,757.61
  6. Step 6: Final answer
    x = 12,336.75

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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.