Home / 20,850.92-31,281.34-6,811.05

Finding the Fourth Proportional to 20,850.92, 31,281.34 and 6,811.05

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Solution

The fourth proportional to 20,850.92, 31,281.34 and 6,811.05 is: 10,218.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.92 : 31,281.34 = 6,811.05 : x
  2. Step 2: Convert to fraction form
    20,850.92/31,281.34 = 6,811.05/x
  3. Step 3: Cross multiply
    20,850.92x = 31,281.34 × 6,811.05
  4. Step 4: Simplify right side
    20,850.92x = 213,058,770.81
  5. Step 5: Solve for x
    x = 213,058,770.81/20,850.92
  6. Step 6: Final answer
    x = 10,218.20

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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.