Home / 21,745.86-29,998.31-12,787.66

Finding the Fourth Proportional to 21,745.86, 29,998.31 and 12,787.66

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Solution

The fourth proportional to 21,745.86, 29,998.31 and 12,787.66 is: 17,640.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,745.86 : 29,998.31 = 12,787.66 : x
  2. Step 2: Convert to fraction form
    21,745.86/29,998.31 = 12,787.66/x
  3. Step 3: Cross multiply
    21,745.86x = 29,998.31 × 12,787.66
  4. Step 4: Simplify right side
    21,745.86x = 383,608,188.85
  5. Step 5: Solve for x
    x = 383,608,188.85/21,745.86
  6. Step 6: Final answer
    x = 17,640.52

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1.5x scale

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.