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Finding the Fourth Proportional to 18,658.91, 25,748.12 and 10,275.41

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Solution

The fourth proportional to 18,658.91, 25,748.12 and 10,275.41 is: 14,179.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,658.91 : 25,748.12 = 10,275.41 : x
  2. Step 2: Convert to fraction form
    18,658.91/25,748.12 = 10,275.41/x
  3. Step 3: Cross multiply
    18,658.91x = 25,748.12 × 10,275.41
  4. Step 4: Simplify right side
    18,658.91x = 264,572,309.61
  5. Step 5: Solve for x
    x = 264,572,309.61/18,658.91
  6. Step 6: Final answer
    x = 14,179.41

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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.