Home / 20,335.88-30,446.30-12,921.96

Finding the Fourth Proportional to 20,335.88, 30,446.30 and 12,921.96

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Solution

The fourth proportional to 20,335.88, 30,446.30 and 12,921.96 is: 19,346.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,335.88 : 30,446.30 = 12,921.96 : x
  2. Step 2: Convert to fraction form
    20,335.88/30,446.30 = 12,921.96/x
  3. Step 3: Cross multiply
    20,335.88x = 30,446.30 × 12,921.96
  4. Step 4: Simplify right side
    20,335.88x = 393,425,870.75
  5. Step 5: Solve for x
    x = 393,425,870.75/20,335.88
  6. Step 6: Final answer
    x = 19,346.39

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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.