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Finding the Fourth Proportional to 29,405.40, 40,578.96 and 15,976.56

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Solution

The fourth proportional to 29,405.40, 40,578.96 and 15,976.56 is: 22,047.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,405.40 : 40,578.96 = 15,976.56 : x
  2. Step 2: Convert to fraction form
    29,405.40/40,578.96 = 15,976.56/x
  3. Step 3: Cross multiply
    29,405.40x = 40,578.96 × 15,976.56
  4. Step 4: Simplify right side
    29,405.40x = 648,312,189.18
  5. Step 5: Solve for x
    x = 648,312,189.18/29,405.40
  6. Step 6: Final answer
    x = 22,047.39

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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.