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Finding the Fourth Proportional to 17,991.59, 26,989.19 and 5,511.47

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Solution

The fourth proportional to 17,991.59, 26,989.19 and 5,511.47 is: 8,267.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,991.59 : 26,989.19 = 5,511.47 : x
  2. Step 2: Convert to fraction form
    17,991.59/26,989.19 = 5,511.47/x
  3. Step 3: Cross multiply
    17,991.59x = 26,989.19 × 5,511.47
  4. Step 4: Simplify right side
    17,991.59x = 148,750,171.59
  5. Step 5: Solve for x
    x = 148,750,171.59/17,991.59
  6. Step 6: Final answer
    x = 8,267.76

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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.