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Finding the Fourth Proportional to 11,226, 15,491.74 and 6,190.40

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Solution

The fourth proportional to 11,226, 15,491.74 and 6,190.40 is: 8,542.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,226 : 15,491.74 = 6,190.40 : x
  2. Step 2: Convert to fraction form
    11,226/15,491.74 = 6,190.40/x
  3. Step 3: Cross multiply
    11,226x = 15,491.74 × 6,190.40
  4. Step 4: Simplify right side
    11,226x = 95,900,067.30
  5. Step 5: Solve for x
    x = 95,900,067.30/11,226
  6. Step 6: Final answer
    x = 8,542.67

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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.