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Finding the Fourth Proportional to 11,274.40, 16,879.20 and 6,900.40

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Solution

The fourth proportional to 11,274.40, 16,879.20 and 6,900.40 is: 10,330.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,274.40 : 16,879.20 = 6,900.40 : x
  2. Step 2: Convert to fraction form
    11,274.40/16,879.20 = 6,900.40/x
  3. Step 3: Cross multiply
    11,274.40x = 16,879.20 × 6,900.40
  4. Step 4: Simplify right side
    11,274.40x = 116,473,231.68
  5. Step 5: Solve for x
    x = 116,473,231.68/11,274.40
  6. Step 6: Final answer
    x = 10,330.77

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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.