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Finding the Fourth Proportional to 28,866, 39,809.55 and 18,785.16

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Solution

The fourth proportional to 28,866, 39,809.55 and 18,785.16 is: 25,906.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,866 : 39,809.55 = 18,785.16 : x
  2. Step 2: Convert to fraction form
    28,866/39,809.55 = 18,785.16/x
  3. Step 3: Cross multiply
    28,866x = 39,809.55 × 18,785.16
  4. Step 4: Simplify right side
    28,866x = 747,828,766.28
  5. Step 5: Solve for x
    x = 747,828,766.28/28,866
  6. Step 6: Final answer
    x = 25,906.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.