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Finding the Fourth Proportional to 17,891.70, 26,828.91 and 6,639.27

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Solution

The fourth proportional to 17,891.70, 26,828.91 and 6,639.27 is: 9,955.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,891.70 : 26,828.91 = 6,639.27 : x
  2. Step 2: Convert to fraction form
    17,891.70/26,828.91 = 6,639.27/x
  3. Step 3: Cross multiply
    17,891.70x = 26,828.91 × 6,639.27
  4. Step 4: Simplify right side
    17,891.70x = 178,124,377.30
  5. Step 5: Solve for x
    x = 178,124,377.30/17,891.70
  6. Step 6: Final answer
    x = 9,955.70

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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.