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Finding the Fourth Proportional to 11,855.86, 16,362.04 and 6,821.70

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Solution

The fourth proportional to 11,855.86, 16,362.04 and 6,821.70 is: 9,414.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,855.86 : 16,362.04 = 6,821.70 : x
  2. Step 2: Convert to fraction form
    11,855.86/16,362.04 = 6,821.70/x
  3. Step 3: Cross multiply
    11,855.86x = 16,362.04 × 6,821.70
  4. Step 4: Simplify right side
    11,855.86x = 111,616,928.27
  5. Step 5: Solve for x
    x = 111,616,928.27/11,855.86
  6. Step 6: Final answer
    x = 9,414.49

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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.