Home / 20,777.09-31,169.70-7,629.56

Finding the Fourth Proportional to 20,777.09, 31,169.70 and 7,629.56

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Solution

The fourth proportional to 20,777.09, 31,169.70 and 7,629.56 is: 11,445.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.09 : 31,169.70 = 7,629.56 : x
  2. Step 2: Convert to fraction form
    20,777.09/31,169.70 = 7,629.56/x
  3. Step 3: Cross multiply
    20,777.09x = 31,169.70 × 7,629.56
  4. Step 4: Simplify right side
    20,777.09x = 237,811,096.33
  5. Step 5: Solve for x
    x = 237,811,096.33/20,777.09
  6. Step 6: Final answer
    x = 11,445.83

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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.