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Finding the Fourth Proportional to 19,697.99, 27,193.25 and 15,211.67

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Solution

The fourth proportional to 19,697.99, 27,193.25 and 15,211.67 is: 20,999.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,697.99 : 27,193.25 = 15,211.67 : x
  2. Step 2: Convert to fraction form
    19,697.99/27,193.25 = 15,211.67/x
  3. Step 3: Cross multiply
    19,697.99x = 27,193.25 × 15,211.67
  4. Step 4: Simplify right side
    19,697.99x = 413,654,745.23
  5. Step 5: Solve for x
    x = 413,654,745.23/19,697.99
  6. Step 6: Final answer
    x = 20,999.85

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Similar ratio
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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.