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Finding the Fourth Proportional to 18,624.40, 27,932.68 and 5,473.20

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Solution

The fourth proportional to 18,624.40, 27,932.68 and 5,473.20 is: 8,208.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,624.40 : 27,932.68 = 5,473.20 : x
  2. Step 2: Convert to fraction form
    18,624.40/27,932.68 = 5,473.20/x
  3. Step 3: Cross multiply
    18,624.40x = 27,932.68 × 5,473.20
  4. Step 4: Simplify right side
    18,624.40x = 152,881,144.18
  5. Step 5: Solve for x
    x = 152,881,144.18/18,624.40
  6. Step 6: Final answer
    x = 8,208.65

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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.