Home / 20,819-31,226.20-5,236.62

Finding the Fourth Proportional to 20,819, 31,226.20 and 5,236.62

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Solution

The fourth proportional to 20,819, 31,226.20 and 5,236.62 is: 7,854.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819 : 31,226.20 = 5,236.62 : x
  2. Step 2: Convert to fraction form
    20,819/31,226.20 = 5,236.62/x
  3. Step 3: Cross multiply
    20,819x = 31,226.20 × 5,236.62
  4. Step 4: Simplify right side
    20,819x = 163,519,743.44
  5. Step 5: Solve for x
    x = 163,519,743.44/20,819
  6. Step 6: Final answer
    x = 7,854.35

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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.