Home / 20,890.92-31,329.89-6,847.86

Finding the Fourth Proportional to 20,890.92, 31,329.89 and 6,847.86

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Solution

The fourth proportional to 20,890.92, 31,329.89 and 6,847.86 is: 10,269.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.92 : 31,329.89 = 6,847.86 : x
  2. Step 2: Convert to fraction form
    20,890.92/31,329.89 = 6,847.86/x
  3. Step 3: Cross multiply
    20,890.92x = 31,329.89 × 6,847.86
  4. Step 4: Simplify right side
    20,890.92x = 214,542,666.30
  5. Step 5: Solve for x
    x = 214,542,666.30/20,890.92
  6. Step 6: Final answer
    x = 10,269.66

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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.