Home / 20,819.69-31,221.39-6,776.30

Finding the Fourth Proportional to 20,819.69, 31,221.39 and 6,776.30

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Solution

The fourth proportional to 20,819.69, 31,221.39 and 6,776.30 is: 10,161.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.69 : 31,221.39 = 6,776.30 : x
  2. Step 2: Convert to fraction form
    20,819.69/31,221.39 = 6,776.30/x
  3. Step 3: Cross multiply
    20,819.69x = 31,221.39 × 6,776.30
  4. Step 4: Simplify right side
    20,819.69x = 211,565,505.06
  5. Step 5: Solve for x
    x = 211,565,505.06/20,819.69
  6. Step 6: Final answer
    x = 10,161.80

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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.