Home / 13,961.90-20,964.45-8,129.90

Finding the Fourth Proportional to 13,961.90, 20,964.45 and 8,129.90

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Solution

The fourth proportional to 13,961.90, 20,964.45 and 8,129.90 is: 12,207.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,961.90 : 20,964.45 = 8,129.90 : x
  2. Step 2: Convert to fraction form
    13,961.90/20,964.45 = 8,129.90/x
  3. Step 3: Cross multiply
    13,961.90x = 20,964.45 × 8,129.90
  4. Step 4: Simplify right side
    13,961.90x = 170,438,882.06
  5. Step 5: Solve for x
    x = 170,438,882.06/13,961.90
  6. Step 6: Final answer
    x = 12,207.43

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1.5x scale

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.