Home / 20,255.10-30,378.60-9,725.10

Finding the Fourth Proportional to 20,255.10, 30,378.60 and 9,725.10

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Solution

The fourth proportional to 20,255.10, 30,378.60 and 9,725.10 is: 14,585.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,255.10 : 30,378.60 = 9,725.10 : x
  2. Step 2: Convert to fraction form
    20,255.10/30,378.60 = 9,725.10/x
  3. Step 3: Cross multiply
    20,255.10x = 30,378.60 × 9,725.10
  4. Step 4: Simplify right side
    20,255.10x = 295,434,922.86
  5. Step 5: Solve for x
    x = 295,434,922.86/20,255.10
  6. Step 6: Final answer
    x = 14,585.71

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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.