Home / 20,142.35-27,784.12-11,960.40

Finding the Fourth Proportional to 20,142.35, 27,784.12 and 11,960.40

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Solution

The fourth proportional to 20,142.35, 27,784.12 and 11,960.40 is: 16,498.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.35 : 27,784.12 = 11,960.40 : x
  2. Step 2: Convert to fraction form
    20,142.35/27,784.12 = 11,960.40/x
  3. Step 3: Cross multiply
    20,142.35x = 27,784.12 × 11,960.40
  4. Step 4: Simplify right side
    20,142.35x = 332,309,340.52
  5. Step 5: Solve for x
    x = 332,309,340.52/20,142.35
  6. Step 6: Final answer
    x = 16,498.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.