Home / 20,879.28-31,302.84-6,830.79

Finding the Fourth Proportional to 20,879.28, 31,302.84 and 6,830.79

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Solution

The fourth proportional to 20,879.28, 31,302.84 and 6,830.79 is: 10,240.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.28 : 31,302.84 = 6,830.79 : x
  2. Step 2: Convert to fraction form
    20,879.28/31,302.84 = 6,830.79/x
  3. Step 3: Cross multiply
    20,879.28x = 31,302.84 × 6,830.79
  4. Step 4: Simplify right side
    20,879.28x = 213,823,126.44
  5. Step 5: Solve for x
    x = 213,823,126.44/20,879.28
  6. Step 6: Final answer
    x = 10,240.92

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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.