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Finding the Fourth Proportional to 16,898.70, 25,345.65 and 5,213.10

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Solution

The fourth proportional to 16,898.70, 25,345.65 and 5,213.10 is: 7,818.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,898.70 : 25,345.65 = 5,213.10 : x
  2. Step 2: Convert to fraction form
    16,898.70/25,345.65 = 5,213.10/x
  3. Step 3: Cross multiply
    16,898.70x = 25,345.65 × 5,213.10
  4. Step 4: Simplify right side
    16,898.70x = 132,129,408.02
  5. Step 5: Solve for x
    x = 132,129,408.02/16,898.70
  6. Step 6: Final answer
    x = 7,818.91

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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.