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Finding the Fourth Proportional to 19,551.97, 26,978.02 and 11,591.29

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Solution

The fourth proportional to 19,551.97, 26,978.02 and 11,591.29 is: 15,993.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,551.97 : 26,978.02 = 11,591.29 : x
  2. Step 2: Convert to fraction form
    19,551.97/26,978.02 = 11,591.29/x
  3. Step 3: Cross multiply
    19,551.97x = 26,978.02 × 11,591.29
  4. Step 4: Simplify right side
    19,551.97x = 312,710,053.45
  5. Step 5: Solve for x
    x = 312,710,053.45/19,551.97
  6. Step 6: Final answer
    x = 15,993.79

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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.