Home / 20,716.40-31,074.60-6,866.80

Finding the Fourth Proportional to 20,716.40, 31,074.60 and 6,866.80

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Solution

The fourth proportional to 20,716.40, 31,074.60 and 6,866.80 is: 10,300.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.40 : 31,074.60 = 6,866.80 : x
  2. Step 2: Convert to fraction form
    20,716.40/31,074.60 = 6,866.80/x
  3. Step 3: Cross multiply
    20,716.40x = 31,074.60 × 6,866.80
  4. Step 4: Simplify right side
    20,716.40x = 213,383,063.28
  5. Step 5: Solve for x
    x = 213,383,063.28/20,716.40
  6. Step 6: Final answer
    x = 10,300.20

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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.