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Finding the Fourth Proportional to 39,441.66, 59,169.69 and 13,143.90

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Solution

The fourth proportional to 39,441.66, 59,169.69 and 13,143.90 is: 19,718.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,441.66 : 59,169.69 = 13,143.90 : x
  2. Step 2: Convert to fraction form
    39,441.66/59,169.69 = 13,143.90/x
  3. Step 3: Cross multiply
    39,441.66x = 59,169.69 × 13,143.90
  4. Step 4: Simplify right side
    39,441.66x = 777,720,488.39
  5. Step 5: Solve for x
    x = 777,720,488.39/39,441.66
  6. Step 6: Final answer
    x = 19,718.25

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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.