Home / 20,191.20-27,865.36-11,695.60

Finding the Fourth Proportional to 20,191.20, 27,865.36 and 11,695.60

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Solution

The fourth proportional to 20,191.20, 27,865.36 and 11,695.60 is: 16,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,191.20 : 27,865.36 = 11,695.60 : x
  2. Step 2: Convert to fraction form
    20,191.20/27,865.36 = 11,695.60/x
  3. Step 3: Cross multiply
    20,191.20x = 27,865.36 × 11,695.60
  4. Step 4: Simplify right side
    20,191.20x = 325,902,104.42
  5. Step 5: Solve for x
    x = 325,902,104.42/20,191.20
  6. Step 6: Final answer
    x = 16,140.80

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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.