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Finding the Fourth Proportional to 13,075.40, 19,611.03 and 10,868.42

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Solution

The fourth proportional to 13,075.40, 19,611.03 and 10,868.42 is: 16,300.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,075.40 : 19,611.03 = 10,868.42 : x
  2. Step 2: Convert to fraction form
    13,075.40/19,611.03 = 10,868.42/x
  3. Step 3: Cross multiply
    13,075.40x = 19,611.03 × 10,868.42
  4. Step 4: Simplify right side
    13,075.40x = 213,140,812.62
  5. Step 5: Solve for x
    x = 213,140,812.62/13,075.40
  6. Step 6: Final answer
    x = 16,300.91

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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.