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Finding the Fourth Proportional to 8,491.87, 11,720.17 and 4,955.07

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Solution

The fourth proportional to 8,491.87, 11,720.17 and 4,955.07 is: 6,838.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,491.87 : 11,720.17 = 4,955.07 : x
  2. Step 2: Convert to fraction form
    8,491.87/11,720.17 = 4,955.07/x
  3. Step 3: Cross multiply
    8,491.87x = 11,720.17 × 4,955.07
  4. Step 4: Simplify right side
    8,491.87x = 58,074,179.39
  5. Step 5: Solve for x
    x = 58,074,179.39/8,491.87
  6. Step 6: Final answer
    x = 6,838.80

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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.