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Finding the Fourth Proportional to 19,687.84, 29,536.68 and 5,836.88

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Solution

The fourth proportional to 19,687.84, 29,536.68 and 5,836.88 is: 8,756.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,687.84 : 29,536.68 = 5,836.88 : x
  2. Step 2: Convert to fraction form
    19,687.84/29,536.68 = 5,836.88/x
  3. Step 3: Cross multiply
    19,687.84x = 29,536.68 × 5,836.88
  4. Step 4: Simplify right side
    19,687.84x = 172,402,056.76
  5. Step 5: Solve for x
    x = 172,402,056.76/19,687.84
  6. Step 6: Final answer
    x = 8,756.78

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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.