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Finding the Fourth Proportional to 11,859.50, 16,367.56 and 6,891.50

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Solution

The fourth proportional to 11,859.50, 16,367.56 and 6,891.50 is: 9,511.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,859.50 : 16,367.56 = 6,891.50 : x
  2. Step 2: Convert to fraction form
    11,859.50/16,367.56 = 6,891.50/x
  3. Step 3: Cross multiply
    11,859.50x = 16,367.56 × 6,891.50
  4. Step 4: Simplify right side
    11,859.50x = 112,797,039.74
  5. Step 5: Solve for x
    x = 112,797,039.74/11,859.50
  6. Step 6: Final answer
    x = 9,511.11

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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.