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Finding the Fourth Proportional to 19,611.75, 29,417.63 and 5,760.75

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Solution

The fourth proportional to 19,611.75, 29,417.63 and 5,760.75 is: 8,641.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,611.75 : 29,417.63 = 5,760.75 : x
  2. Step 2: Convert to fraction form
    19,611.75/29,417.63 = 5,760.75/x
  3. Step 3: Cross multiply
    19,611.75x = 29,417.63 × 5,760.75
  4. Step 4: Simplify right side
    19,611.75x = 169,467,583.22
  5. Step 5: Solve for x
    x = 169,467,583.22/19,611.75
  6. Step 6: Final answer
    x = 8,641.13

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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.