Home / 20,808.38-28,713.58-11,855.65

Finding the Fourth Proportional to 20,808.38, 28,713.58 and 11,855.65

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Solution

The fourth proportional to 20,808.38, 28,713.58 and 11,855.65 is: 16,359.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.38 : 28,713.58 = 11,855.65 : x
  2. Step 2: Convert to fraction form
    20,808.38/28,713.58 = 11,855.65/x
  3. Step 3: Cross multiply
    20,808.38x = 28,713.58 × 11,855.65
  4. Step 4: Simplify right side
    20,808.38x = 340,418,154.73
  5. Step 5: Solve for x
    x = 340,418,154.73/20,808.38
  6. Step 6: Final answer
    x = 16,359.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.