Home / 12,857.91-19,255.41-11,611.32

Finding the Fourth Proportional to 12,857.91, 19,255.41 and 11,611.32

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Solution

The fourth proportional to 12,857.91, 19,255.41 and 11,611.32 is: 17,388.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,857.91 : 19,255.41 = 11,611.32 : x
  2. Step 2: Convert to fraction form
    12,857.91/19,255.41 = 11,611.32/x
  3. Step 3: Cross multiply
    12,857.91x = 19,255.41 × 11,611.32
  4. Step 4: Simplify right side
    12,857.91x = 223,580,727.24
  5. Step 5: Solve for x
    x = 223,580,727.24/12,857.91
  6. Step 6: Final answer
    x = 17,388.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.