Home / 20,630.43-30,955.87-8,159.40

Finding the Fourth Proportional to 20,630.43, 30,955.87 and 8,159.40

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Solution

The fourth proportional to 20,630.43, 30,955.87 and 8,159.40 is: 12,243.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.43 : 30,955.87 = 8,159.40 : x
  2. Step 2: Convert to fraction form
    20,630.43/30,955.87 = 8,159.40/x
  3. Step 3: Cross multiply
    20,630.43x = 30,955.87 × 8,159.40
  4. Step 4: Simplify right side
    20,630.43x = 252,581,335.88
  5. Step 5: Solve for x
    x = 252,581,335.88/20,630.43
  6. Step 6: Final answer
    x = 12,243.14

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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.