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Finding the Fourth Proportional to 18,809.94, 28,178.28 and 8,935.62

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Solution

The fourth proportional to 18,809.94, 28,178.28 and 8,935.62 is: 13,386.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809.94 : 28,178.28 = 8,935.62 : x
  2. Step 2: Convert to fraction form
    18,809.94/28,178.28 = 8,935.62/x
  3. Step 3: Cross multiply
    18,809.94x = 28,178.28 × 8,935.62
  4. Step 4: Simplify right side
    18,809.94x = 251,790,402.33
  5. Step 5: Solve for x
    x = 251,790,402.33/18,809.94
  6. Step 6: Final answer
    x = 13,386.03

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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.