Home / 20,128.27-30,193.21-5,135.77

Finding the Fourth Proportional to 20,128.27, 30,193.21 and 5,135.77

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Solution

The fourth proportional to 20,128.27, 30,193.21 and 5,135.77 is: 7,703.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.27 : 30,193.21 = 5,135.77 : x
  2. Step 2: Convert to fraction form
    20,128.27/30,193.21 = 5,135.77/x
  3. Step 3: Cross multiply
    20,128.27x = 30,193.21 × 5,135.77
  4. Step 4: Simplify right side
    20,128.27x = 155,065,382.12
  5. Step 5: Solve for x
    x = 155,065,382.12/20,128.27
  6. Step 6: Final answer
    x = 7,703.86

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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.