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Finding the Fourth Proportional to 19,411.61, 26,787.88 and 11,028.11

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Solution

The fourth proportional to 19,411.61, 26,787.88 and 11,028.11 is: 15,218.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,411.61 : 26,787.88 = 11,028.11 : x
  2. Step 2: Convert to fraction form
    19,411.61/26,787.88 = 11,028.11/x
  3. Step 3: Cross multiply
    19,411.61x = 26,787.88 × 11,028.11
  4. Step 4: Simplify right side
    19,411.61x = 295,419,567.15
  5. Step 5: Solve for x
    x = 295,419,567.15/19,411.61
  6. Step 6: Final answer
    x = 15,218.71

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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.