Home / 20,379.80-30,520.33-10,358.19

Finding the Fourth Proportional to 20,379.80, 30,520.33 and 10,358.19

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Solution

The fourth proportional to 20,379.80, 30,520.33 and 10,358.19 is: 15,512.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.80 : 30,520.33 = 10,358.19 : x
  2. Step 2: Convert to fraction form
    20,379.80/30,520.33 = 10,358.19/x
  3. Step 3: Cross multiply
    20,379.80x = 30,520.33 × 10,358.19
  4. Step 4: Simplify right side
    20,379.80x = 316,135,351.11
  5. Step 5: Solve for x
    x = 316,135,351.11/20,379.80
  6. Step 6: Final answer
    x = 15,512.19

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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.