Home / 20,212.20-30,318.30-19,405.80

Finding the Fourth Proportional to 20,212.20, 30,318.30 and 19,405.80

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Solution

The fourth proportional to 20,212.20, 30,318.30 and 19,405.80 is: 29,108.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,212.20 : 30,318.30 = 19,405.80 : x
  2. Step 2: Convert to fraction form
    20,212.20/30,318.30 = 19,405.80/x
  3. Step 3: Cross multiply
    20,212.20x = 30,318.30 × 19,405.80
  4. Step 4: Simplify right side
    20,212.20x = 588,350,866.14
  5. Step 5: Solve for x
    x = 588,350,866.14/20,212.20
  6. Step 6: Final answer
    x = 29,108.70

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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.