Home / 20,399.70-28,180.26-15,743.82

Finding the Fourth Proportional to 20,399.70, 28,180.26 and 15,743.82

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Solution

The fourth proportional to 20,399.70, 28,180.26 and 15,743.82 is: 21,748.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399.70 : 28,180.26 = 15,743.82 : x
  2. Step 2: Convert to fraction form
    20,399.70/28,180.26 = 15,743.82/x
  3. Step 3: Cross multiply
    20,399.70x = 28,180.26 × 15,743.82
  4. Step 4: Simplify right side
    20,399.70x = 443,664,940.99
  5. Step 5: Solve for x
    x = 443,664,940.99/20,399.70
  6. Step 6: Final answer
    x = 21,748.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.