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Finding the Fourth Proportional to 8,491.56, 11,722.83 and 5,135.12

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Solution

The fourth proportional to 8,491.56, 11,722.83 and 5,135.12 is: 7,089.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,491.56 : 11,722.83 = 5,135.12 : x
  2. Step 2: Convert to fraction form
    8,491.56/11,722.83 = 5,135.12/x
  3. Step 3: Cross multiply
    8,491.56x = 11,722.83 × 5,135.12
  4. Step 4: Simplify right side
    8,491.56x = 60,198,138.79
  5. Step 5: Solve for x
    x = 60,198,138.79/8,491.56
  6. Step 6: Final answer
    x = 7,089.17

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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.