Home / 18,778.75-28,172.57-6,128.44

Finding the Fourth Proportional to 18,778.75, 28,172.57 and 6,128.44

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Solution

The fourth proportional to 18,778.75, 28,172.57 and 6,128.44 is: 9,194.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,778.75 : 28,172.57 = 6,128.44 : x
  2. Step 2: Convert to fraction form
    18,778.75/28,172.57 = 6,128.44/x
  3. Step 3: Cross multiply
    18,778.75x = 28,172.57 × 6,128.44
  4. Step 4: Simplify right side
    18,778.75x = 172,653,904.89
  5. Step 5: Solve for x
    x = 172,653,904.89/18,778.75
  6. Step 6: Final answer
    x = 9,194.11

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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.