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Finding the Fourth Proportional to 7,951.45, 11,929.46 and 3,209.11

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Solution

The fourth proportional to 7,951.45, 11,929.46 and 3,209.11 is: 4,814.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,951.45 : 11,929.46 = 3,209.11 : x
  2. Step 2: Convert to fraction form
    7,951.45/11,929.46 = 3,209.11/x
  3. Step 3: Cross multiply
    7,951.45x = 11,929.46 × 3,209.11
  4. Step 4: Simplify right side
    7,951.45x = 38,282,949.38
  5. Step 5: Solve for x
    x = 38,282,949.38/7,951.45
  6. Step 6: Final answer
    x = 4,814.59

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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.