Home / 20,809.92-31,211.64-6,770.34

Finding the Fourth Proportional to 20,809.92, 31,211.64 and 6,770.34

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Solution

The fourth proportional to 20,809.92, 31,211.64 and 6,770.34 is: 10,154.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.92 : 31,211.64 = 6,770.34 : x
  2. Step 2: Convert to fraction form
    20,809.92/31,211.64 = 6,770.34/x
  3. Step 3: Cross multiply
    20,809.92x = 31,211.64 × 6,770.34
  4. Step 4: Simplify right side
    20,809.92x = 211,313,414.76
  5. Step 5: Solve for x
    x = 211,313,414.76/20,809.92
  6. Step 6: Final answer
    x = 10,154.46

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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.