Home / 12,721.78-19,082.67-3,487.78

Finding the Fourth Proportional to 12,721.78, 19,082.67 and 3,487.78

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Solution

The fourth proportional to 12,721.78, 19,082.67 and 3,487.78 is: 5,231.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.78 : 19,082.67 = 3,487.78 : x
  2. Step 2: Convert to fraction form
    12,721.78/19,082.67 = 3,487.78/x
  3. Step 3: Cross multiply
    12,721.78x = 19,082.67 × 3,487.78
  4. Step 4: Simplify right side
    12,721.78x = 66,556,185.17
  5. Step 5: Solve for x
    x = 66,556,185.17/12,721.78
  6. Step 6: Final answer
    x = 5,231.67

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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.