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Finding the Fourth Proportional to 8,682.70, 11,981.78 and 5,097.18

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Solution

The fourth proportional to 8,682.70, 11,981.78 and 5,097.18 is: 7,033.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,682.70 : 11,981.78 = 5,097.18 : x
  2. Step 2: Convert to fraction form
    8,682.70/11,981.78 = 5,097.18/x
  3. Step 3: Cross multiply
    8,682.70x = 11,981.78 × 5,097.18
  4. Step 4: Simplify right side
    8,682.70x = 61,073,289.38
  5. Step 5: Solve for x
    x = 61,073,289.38/8,682.70
  6. Step 6: Final answer
    x = 7,033.91

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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.