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Finding the Fourth Proportional to 17,991.47, 26,989 and 5,511.35

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Solution

The fourth proportional to 17,991.47, 26,989 and 5,511.35 is: 8,267.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,991.47 : 26,989 = 5,511.35 : x
  2. Step 2: Convert to fraction form
    17,991.47/26,989 = 5,511.35/x
  3. Step 3: Cross multiply
    17,991.47x = 26,989 × 5,511.35
  4. Step 4: Simplify right side
    17,991.47x = 148,745,825.15
  5. Step 5: Solve for x
    x = 148,745,825.15/17,991.47
  6. Step 6: Final answer
    x = 8,267.57

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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.