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Finding the Fourth Proportional to 7,818.85, 10,789.97 and 7,183.43

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Solution

The fourth proportional to 7,818.85, 10,789.97 and 7,183.43 is: 9,913.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,818.85 : 10,789.97 = 7,183.43 : x
  2. Step 2: Convert to fraction form
    7,818.85/10,789.97 = 7,183.43/x
  3. Step 3: Cross multiply
    7,818.85x = 10,789.97 × 7,183.43
  4. Step 4: Simplify right side
    7,818.85x = 77,508,994.20
  5. Step 5: Solve for x
    x = 77,508,994.20/7,818.85
  6. Step 6: Final answer
    x = 9,913.09

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1.5x scale

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.