Home / 20,819.81-31,221.58-6,776.43

Finding the Fourth Proportional to 20,819.81, 31,221.58 and 6,776.43

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Solution

The fourth proportional to 20,819.81, 31,221.58 and 6,776.43 is: 10,161.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.81 : 31,221.58 = 6,776.43 : x
  2. Step 2: Convert to fraction form
    20,819.81/31,221.58 = 6,776.43/x
  3. Step 3: Cross multiply
    20,819.81x = 31,221.58 × 6,776.43
  4. Step 4: Simplify right side
    20,819.81x = 211,570,661.37
  5. Step 5: Solve for x
    x = 211,570,661.37/20,819.81
  6. Step 6: Final answer
    x = 10,161.99

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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.