Home / 20,274.56-30,400.48-7,121.76

Finding the Fourth Proportional to 20,274.56, 30,400.48 and 7,121.76

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Solution

The fourth proportional to 20,274.56, 30,400.48 and 7,121.76 is: 10,678.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,274.56 : 30,400.48 = 7,121.76 : x
  2. Step 2: Convert to fraction form
    20,274.56/30,400.48 = 7,121.76/x
  3. Step 3: Cross multiply
    20,274.56x = 30,400.48 × 7,121.76
  4. Step 4: Simplify right side
    20,274.56x = 216,504,922.44
  5. Step 5: Solve for x
    x = 216,504,922.44/20,274.56
  6. Step 6: Final answer
    x = 10,678.65

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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.