Home / 20,423.39-30,620.05-7,771.37

Finding the Fourth Proportional to 20,423.39, 30,620.05 and 7,771.37

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Solution

The fourth proportional to 20,423.39, 30,620.05 and 7,771.37 is: 11,651.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,423.39 : 30,620.05 = 7,771.37 : x
  2. Step 2: Convert to fraction form
    20,423.39/30,620.05 = 7,771.37/x
  3. Step 3: Cross multiply
    20,423.39x = 30,620.05 × 7,771.37
  4. Step 4: Simplify right side
    20,423.39x = 237,959,673.42
  5. Step 5: Solve for x
    x = 237,959,673.42/20,423.39
  6. Step 6: Final answer
    x = 11,651.33

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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.