Home / 21,135.34-31,734.12-11,793.61

Finding the Fourth Proportional to 21,135.34, 31,734.12 and 11,793.61

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Solution

The fourth proportional to 21,135.34, 31,734.12 and 11,793.61 is: 17,707.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.34 : 31,734.12 = 11,793.61 : x
  2. Step 2: Convert to fraction form
    21,135.34/31,734.12 = 11,793.61/x
  3. Step 3: Cross multiply
    21,135.34x = 31,734.12 × 11,793.61
  4. Step 4: Simplify right side
    21,135.34x = 374,259,676.30
  5. Step 5: Solve for x
    x = 374,259,676.30/21,135.34
  6. Step 6: Final answer
    x = 17,707.77

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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.