Home / 20,334.90-30,444.84-12,921

Finding the Fourth Proportional to 20,334.90, 30,444.84 and 12,921

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Solution

The fourth proportional to 20,334.90, 30,444.84 and 12,921 is: 19,344.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,334.90 : 30,444.84 = 12,921 : x
  2. Step 2: Convert to fraction form
    20,334.90/30,444.84 = 12,921/x
  3. Step 3: Cross multiply
    20,334.90x = 30,444.84 × 12,921
  4. Step 4: Simplify right side
    20,334.90x = 393,377,777.64
  5. Step 5: Solve for x
    x = 393,377,777.64/20,334.90
  6. Step 6: Final answer
    x = 19,344.96

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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.