Home / 20,777.18-31,179.42-7,629.68

Finding the Fourth Proportional to 20,777.18, 31,179.42 and 7,629.68

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Solution

The fourth proportional to 20,777.18, 31,179.42 and 7,629.68 is: 11,449.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.18 : 31,179.42 = 7,629.68 : x
  2. Step 2: Convert to fraction form
    20,777.18/31,179.42 = 7,629.68/x
  3. Step 3: Cross multiply
    20,777.18x = 31,179.42 × 7,629.68
  4. Step 4: Simplify right side
    20,777.18x = 237,888,997.19
  5. Step 5: Solve for x
    x = 237,888,997.19/20,777.18
  6. Step 6: Final answer
    x = 11,449.53

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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.