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Finding the Fourth Proportional to 11,855.49, 16,358.72 and 6,819.90

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Solution

The fourth proportional to 11,855.49, 16,358.72 and 6,819.90 is: 9,410.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,855.49 : 16,358.72 = 6,819.90 : x
  2. Step 2: Convert to fraction form
    11,855.49/16,358.72 = 6,819.90/x
  3. Step 3: Cross multiply
    11,855.49x = 16,358.72 × 6,819.90
  4. Step 4: Simplify right side
    11,855.49x = 111,564,800.43
  5. Step 5: Solve for x
    x = 111,564,800.43/11,855.49
  6. Step 6: Final answer
    x = 9,410.39

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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.