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Finding the Fourth Proportional to 14,425.65, 19,904.00 and 8,136.81

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Solution

The fourth proportional to 14,425.65, 19,904.00 and 8,136.81 is: 11,226.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,425.65 : 19,904.00 = 8,136.81 : x
  2. Step 2: Convert to fraction form
    14,425.65/19,904.00 = 8,136.81/x
  3. Step 3: Cross multiply
    14,425.65x = 19,904.00 × 8,136.81
  4. Step 4: Simplify right side
    14,425.65x = 161,955,025.56
  5. Step 5: Solve for x
    x = 161,955,025.56/14,425.65
  6. Step 6: Final answer
    x = 11,226.88

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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.