Home / 19,172.85-28,753.60-8,636.78

Finding the Fourth Proportional to 19,172.85, 28,753.60 and 8,636.78

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Solution

The fourth proportional to 19,172.85, 28,753.60 and 8,636.78 is: 12,952.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,172.85 : 28,753.60 = 8,636.78 : x
  2. Step 2: Convert to fraction form
    19,172.85/28,753.60 = 8,636.78/x
  3. Step 3: Cross multiply
    19,172.85x = 28,753.60 × 8,636.78
  4. Step 4: Simplify right side
    19,172.85x = 248,338,517.41
  5. Step 5: Solve for x
    x = 248,338,517.41/19,172.85
  6. Step 6: Final answer
    x = 12,952.61

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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.