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Finding the Fourth Proportional to 8,472.24, 12,698.64 and 2,922.12

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Solution

The fourth proportional to 8,472.24, 12,698.64 and 2,922.12 is: 4,379.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,472.24 : 12,698.64 = 2,922.12 : x
  2. Step 2: Convert to fraction form
    8,472.24/12,698.64 = 2,922.12/x
  3. Step 3: Cross multiply
    8,472.24x = 12,698.64 × 2,922.12
  4. Step 4: Simplify right side
    8,472.24x = 37,106,949.92
  5. Step 5: Solve for x
    x = 37,106,949.92/8,472.24
  6. Step 6: Final answer
    x = 4,379.83

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1.5x scale

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.