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Finding the Fourth Proportional to 11,959.50, 16,504.11 and 6,991.50

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Solution

The fourth proportional to 11,959.50, 16,504.11 and 6,991.50 is: 9,648.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,959.50 : 16,504.11 = 6,991.50 : x
  2. Step 2: Convert to fraction form
    11,959.50/16,504.11 = 6,991.50/x
  3. Step 3: Cross multiply
    11,959.50x = 16,504.11 × 6,991.50
  4. Step 4: Simplify right side
    11,959.50x = 115,388,485.07
  5. Step 5: Solve for x
    x = 115,388,485.07/11,959.50
  6. Step 6: Final answer
    x = 9,648.27

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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.