Home / 20,480.23-30,725.71-6,439.69

Finding the Fourth Proportional to 20,480.23, 30,725.71 and 6,439.69

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Solution

The fourth proportional to 20,480.23, 30,725.71 and 6,439.69 is: 9,661.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.23 : 30,725.71 = 6,439.69 : x
  2. Step 2: Convert to fraction form
    20,480.23/30,725.71 = 6,439.69/x
  3. Step 3: Cross multiply
    20,480.23x = 30,725.71 × 6,439.69
  4. Step 4: Simplify right side
    20,480.23x = 197,864,047.43
  5. Step 5: Solve for x
    x = 197,864,047.43/20,480.23
  6. Step 6: Final answer
    x = 9,661.22

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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.