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Finding the Fourth Proportional to 21,842.75, 32,764.13 and 5,426.75

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Solution

The fourth proportional to 21,842.75, 32,764.13 and 5,426.75 is: 8,140.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,842.75 : 32,764.13 = 5,426.75 : x
  2. Step 2: Convert to fraction form
    21,842.75/32,764.13 = 5,426.75/x
  3. Step 3: Cross multiply
    21,842.75x = 32,764.13 × 5,426.75
  4. Step 4: Simplify right side
    21,842.75x = 177,802,715.34
  5. Step 5: Solve for x
    x = 177,802,715.34/21,842.75
  6. Step 6: Final answer
    x = 8,140.13

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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.