Home / 11,891.32-16,405.80-7,107.94

Finding the Fourth Proportional to 11,891.32, 16,405.80 and 7,107.94

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Solution

The fourth proportional to 11,891.32, 16,405.80 and 7,107.94 is: 9,806.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,891.32 : 16,405.80 = 7,107.94 : x
  2. Step 2: Convert to fraction form
    11,891.32/16,405.80 = 7,107.94/x
  3. Step 3: Cross multiply
    11,891.32x = 16,405.80 × 7,107.94
  4. Step 4: Simplify right side
    11,891.32x = 116,611,462.81
  5. Step 5: Solve for x
    x = 116,611,462.81/11,891.32
  6. Step 6: Final answer
    x = 9,806.44

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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.