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Finding the Fourth Proportional to 29,621.76, 40,866.36 and 17,039.76

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Solution

The fourth proportional to 29,621.76, 40,866.36 and 17,039.76 is: 23,508.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,621.76 : 40,866.36 = 17,039.76 : x
  2. Step 2: Convert to fraction form
    29,621.76/40,866.36 = 17,039.76/x
  3. Step 3: Cross multiply
    29,621.76x = 40,866.36 × 17,039.76
  4. Step 4: Simplify right side
    29,621.76x = 696,352,966.47
  5. Step 5: Solve for x
    x = 696,352,966.47/29,621.76
  6. Step 6: Final answer
    x = 23,508.16

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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.