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Finding the Fourth Proportional to 19,919.09, 29,897.09 and 10,065.29

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Solution

The fourth proportional to 19,919.09, 29,897.09 and 10,065.29 is: 15,107.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,919.09 : 29,897.09 = 10,065.29 : x
  2. Step 2: Convert to fraction form
    19,919.09/29,897.09 = 10,065.29/x
  3. Step 3: Cross multiply
    19,919.09x = 29,897.09 × 10,065.29
  4. Step 4: Simplify right side
    19,919.09x = 300,922,881.01
  5. Step 5: Solve for x
    x = 300,922,881.01/19,919.09
  6. Step 6: Final answer
    x = 15,107.26

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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.