Home / 18,806.18-28,198.85-7,720.67

Finding the Fourth Proportional to 18,806.18, 28,198.85 and 7,720.67

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Solution

The fourth proportional to 18,806.18, 28,198.85 and 7,720.67 is: 11,576.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,806.18 : 28,198.85 = 7,720.67 : x
  2. Step 2: Convert to fraction form
    18,806.18/28,198.85 = 7,720.67/x
  3. Step 3: Cross multiply
    18,806.18x = 28,198.85 × 7,720.67
  4. Step 4: Simplify right side
    18,806.18x = 217,713,835.63
  5. Step 5: Solve for x
    x = 217,713,835.63/18,806.18
  6. Step 6: Final answer
    x = 11,576.72

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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.