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Finding the Fourth Proportional to 17,619.30, 26,428.80 and 4,471.49

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Solution

The fourth proportional to 17,619.30, 26,428.80 and 4,471.49 is: 6,707.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,619.30 : 26,428.80 = 4,471.49 : x
  2. Step 2: Convert to fraction form
    17,619.30/26,428.80 = 4,471.49/x
  3. Step 3: Cross multiply
    17,619.30x = 26,428.80 × 4,471.49
  4. Step 4: Simplify right side
    17,619.30x = 118,175,982.77
  5. Step 5: Solve for x
    x = 118,175,982.77/17,619.30
  6. Step 6: Final answer
    x = 6,707.19

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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.