Home / 20,120.86-30,171.16-6,969.70

Finding the Fourth Proportional to 20,120.86, 30,171.16 and 6,969.70

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Solution

The fourth proportional to 20,120.86, 30,171.16 and 6,969.70 is: 10,451.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.86 : 30,171.16 = 6,969.70 : x
  2. Step 2: Convert to fraction form
    20,120.86/30,171.16 = 6,969.70/x
  3. Step 3: Cross multiply
    20,120.86x = 30,171.16 × 6,969.70
  4. Step 4: Simplify right side
    20,120.86x = 210,283,933.85
  5. Step 5: Solve for x
    x = 210,283,933.85/20,120.86
  6. Step 6: Final answer
    x = 10,451.04

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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.