Home / 12,811.78-19,217.67-3,577.78

Finding the Fourth Proportional to 12,811.78, 19,217.67 and 3,577.78

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Solution

The fourth proportional to 12,811.78, 19,217.67 and 3,577.78 is: 5,366.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.78 : 19,217.67 = 3,577.78 : x
  2. Step 2: Convert to fraction form
    12,811.78/19,217.67 = 3,577.78/x
  3. Step 3: Cross multiply
    12,811.78x = 19,217.67 × 3,577.78
  4. Step 4: Simplify right side
    12,811.78x = 68,756,595.37
  5. Step 5: Solve for x
    x = 68,756,595.37/12,811.78
  6. Step 6: Final answer
    x = 5,366.67

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Similar ratio
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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.