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Finding the Fourth Proportional to 28,786.39, 43,185.39 and 12,146.39

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Solution

The fourth proportional to 28,786.39, 43,185.39 and 12,146.39 is: 18,222.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,786.39 : 43,185.39 = 12,146.39 : x
  2. Step 2: Convert to fraction form
    28,786.39/43,185.39 = 12,146.39/x
  3. Step 3: Cross multiply
    28,786.39x = 43,185.39 × 12,146.39
  4. Step 4: Simplify right side
    28,786.39x = 524,546,723.14
  5. Step 5: Solve for x
    x = 524,546,723.14/28,786.39
  6. Step 6: Final answer
    x = 18,222.04

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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.