Home / 20,128.80-30,193.20-7,648.86

Finding the Fourth Proportional to 20,128.80, 30,193.20 and 7,648.86

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Solution

The fourth proportional to 20,128.80, 30,193.20 and 7,648.86 is: 11,473.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.80 : 30,193.20 = 7,648.86 : x
  2. Step 2: Convert to fraction form
    20,128.80/30,193.20 = 7,648.86/x
  3. Step 3: Cross multiply
    20,128.80x = 30,193.20 × 7,648.86
  4. Step 4: Simplify right side
    20,128.80x = 230,943,559.75
  5. Step 5: Solve for x
    x = 230,943,559.75/20,128.80
  6. Step 6: Final answer
    x = 11,473.29

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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.