Home / 20,422.56-30,629.84-5,627.76

Finding the Fourth Proportional to 20,422.56, 30,629.84 and 5,627.76

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Solution

The fourth proportional to 20,422.56, 30,629.84 and 5,627.76 is: 8,440.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422.56 : 30,629.84 = 5,627.76 : x
  2. Step 2: Convert to fraction form
    20,422.56/30,629.84 = 5,627.76/x
  3. Step 3: Cross multiply
    20,422.56x = 30,629.84 × 5,627.76
  4. Step 4: Simplify right side
    20,422.56x = 172,377,388.36
  5. Step 5: Solve for x
    x = 172,377,388.36/20,422.56
  6. Step 6: Final answer
    x = 8,440.54

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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.