Home / 20,379.40-30,562.20-7,229.88

Finding the Fourth Proportional to 20,379.40, 30,562.20 and 7,229.88

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Solution

The fourth proportional to 20,379.40, 30,562.20 and 7,229.88 is: 10,842.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.40 : 30,562.20 = 7,229.88 : x
  2. Step 2: Convert to fraction form
    20,379.40/30,562.20 = 7,229.88/x
  3. Step 3: Cross multiply
    20,379.40x = 30,562.20 × 7,229.88
  4. Step 4: Simplify right side
    20,379.40x = 220,961,038.54
  5. Step 5: Solve for x
    x = 220,961,038.54/20,379.40
  6. Step 6: Final answer
    x = 10,842.37

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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.