Home / 20,366.70-30,556.72-12,861.60

Finding the Fourth Proportional to 20,366.70, 30,556.72 and 12,861.60

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Solution

The fourth proportional to 20,366.70, 30,556.72 and 12,861.60 is: 19,296.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,366.70 : 30,556.72 = 12,861.60 : x
  2. Step 2: Convert to fraction form
    20,366.70/30,556.72 = 12,861.60/x
  3. Step 3: Cross multiply
    20,366.70x = 30,556.72 × 12,861.60
  4. Step 4: Simplify right side
    20,366.70x = 393,008,309.95
  5. Step 5: Solve for x
    x = 393,008,309.95/20,366.70
  6. Step 6: Final answer
    x = 19,296.61

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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.