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Finding the Fourth Proportional to 19,183.78, 28,768.78 and 7,340.87

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Solution

The fourth proportional to 19,183.78, 28,768.78 and 7,340.87 is: 11,008.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,183.78 : 28,768.78 = 7,340.87 : x
  2. Step 2: Convert to fraction form
    19,183.78/28,768.78 = 7,340.87/x
  3. Step 3: Cross multiply
    19,183.78x = 28,768.78 × 7,340.87
  4. Step 4: Simplify right side
    19,183.78x = 211,187,927.61
  5. Step 5: Solve for x
    x = 211,187,927.61/19,183.78
  6. Step 6: Final answer
    x = 11,008.67

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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.