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Finding the Fourth Proportional to 19,807.76, 29,713.08 and 6,661.52

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Solution

The fourth proportional to 19,807.76, 29,713.08 and 6,661.52 is: 9,992.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,807.76 : 29,713.08 = 6,661.52 : x
  2. Step 2: Convert to fraction form
    19,807.76/29,713.08 = 6,661.52/x
  3. Step 3: Cross multiply
    19,807.76x = 29,713.08 × 6,661.52
  4. Step 4: Simplify right side
    19,807.76x = 197,934,276.68
  5. Step 5: Solve for x
    x = 197,934,276.68/19,807.76
  6. Step 6: Final answer
    x = 9,992.76

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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.