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Finding the Fourth Proportional to 19,808.43, 29,711.18 and 7,322.63

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Solution

The fourth proportional to 19,808.43, 29,711.18 and 7,322.63 is: 10,983.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,808.43 : 29,711.18 = 7,322.63 : x
  2. Step 2: Convert to fraction form
    19,808.43/29,711.18 = 7,322.63/x
  3. Step 3: Cross multiply
    19,808.43x = 29,711.18 × 7,322.63
  4. Step 4: Simplify right side
    19,808.43x = 217,563,978.00
  5. Step 5: Solve for x
    x = 217,563,978.00/19,808.43
  6. Step 6: Final answer
    x = 10,983.40

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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.