Home / 20,135.15-30,202.68-5,142.27

Finding the Fourth Proportional to 20,135.15, 30,202.68 and 5,142.27

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Solution

The fourth proportional to 20,135.15, 30,202.68 and 5,142.27 is: 7,713.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.15 : 30,202.68 = 5,142.27 : x
  2. Step 2: Convert to fraction form
    20,135.15/30,202.68 = 5,142.27/x
  3. Step 3: Cross multiply
    20,135.15x = 30,202.68 × 5,142.27
  4. Step 4: Simplify right side
    20,135.15x = 155,310,335.28
  5. Step 5: Solve for x
    x = 155,310,335.28/20,135.15
  6. Step 6: Final answer
    x = 7,713.40

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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.