Home / 20,128.96-30,200.16-6,984.64

Finding the Fourth Proportional to 20,128.96, 30,200.16 and 6,984.64

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Solution

The fourth proportional to 20,128.96, 30,200.16 and 6,984.64 is: 10,479.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.96 : 30,200.16 = 6,984.64 : x
  2. Step 2: Convert to fraction form
    20,128.96/30,200.16 = 6,984.64/x
  3. Step 3: Cross multiply
    20,128.96x = 30,200.16 × 6,984.64
  4. Step 4: Simplify right side
    20,128.96x = 210,937,245.54
  5. Step 5: Solve for x
    x = 210,937,245.54/20,128.96
  6. Step 6: Final answer
    x = 10,479.29

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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.