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Finding the Fourth Proportional to 11,891.87, 16,409.72 and 6,585.29

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Solution

The fourth proportional to 11,891.87, 16,409.72 and 6,585.29 is: 9,087.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,891.87 : 16,409.72 = 6,585.29 : x
  2. Step 2: Convert to fraction form
    11,891.87/16,409.72 = 6,585.29/x
  3. Step 3: Cross multiply
    11,891.87x = 16,409.72 × 6,585.29
  4. Step 4: Simplify right side
    11,891.87x = 108,062,732.09
  5. Step 5: Solve for x
    x = 108,062,732.09/11,891.87
  6. Step 6: Final answer
    x = 9,087.11

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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.