Home / 20,469.20-30,703.80-5,678.12

Finding the Fourth Proportional to 20,469.20, 30,703.80 and 5,678.12

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Solution

The fourth proportional to 20,469.20, 30,703.80 and 5,678.12 is: 8,517.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,469.20 : 30,703.80 = 5,678.12 : x
  2. Step 2: Convert to fraction form
    20,469.20/30,703.80 = 5,678.12/x
  3. Step 3: Cross multiply
    20,469.20x = 30,703.80 × 5,678.12
  4. Step 4: Simplify right side
    20,469.20x = 174,339,860.86
  5. Step 5: Solve for x
    x = 174,339,860.86/20,469.20
  6. Step 6: Final answer
    x = 8,517.18

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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.