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Finding the Fourth Proportional to 18,965.15, 28,303.52 and 16,863.32

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Solution

The fourth proportional to 18,965.15, 28,303.52 and 16,863.32 is: 25,166.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965.15 : 28,303.52 = 16,863.32 : x
  2. Step 2: Convert to fraction form
    18,965.15/28,303.52 = 16,863.32/x
  3. Step 3: Cross multiply
    18,965.15x = 28,303.52 × 16,863.32
  4. Step 4: Simplify right side
    18,965.15x = 477,291,089.05
  5. Step 5: Solve for x
    x = 477,291,089.05/18,965.15
  6. Step 6: Final answer
    x = 25,166.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.