Home / 20,142.38-30,213.58-7,659.52

Finding the Fourth Proportional to 20,142.38, 30,213.58 and 7,659.52

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Solution

The fourth proportional to 20,142.38, 30,213.58 and 7,659.52 is: 11,489.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.38 : 30,213.58 = 7,659.52 : x
  2. Step 2: Convert to fraction form
    20,142.38/30,213.58 = 7,659.52/x
  3. Step 3: Cross multiply
    20,142.38x = 30,213.58 × 7,659.52
  4. Step 4: Simplify right side
    20,142.38x = 231,421,520.28
  5. Step 5: Solve for x
    x = 231,421,520.28/20,142.38
  6. Step 6: Final answer
    x = 11,489.28

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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.