Home / 12,889.11-19,336.10-4,121.67

Finding the Fourth Proportional to 12,889.11, 19,336.10 and 4,121.67

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Solution

The fourth proportional to 12,889.11, 19,336.10 and 4,121.67 is: 6,183.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,889.11 : 19,336.10 = 4,121.67 : x
  2. Step 2: Convert to fraction form
    12,889.11/19,336.10 = 4,121.67/x
  3. Step 3: Cross multiply
    12,889.11x = 19,336.10 × 4,121.67
  4. Step 4: Simplify right side
    12,889.11x = 79,697,002.68
  5. Step 5: Solve for x
    x = 79,697,002.68/12,889.11
  6. Step 6: Final answer
    x = 6,183.28

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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.