Home / 20,290.20-30,438.14-9,199.68

Finding the Fourth Proportional to 20,290.20, 30,438.14 and 9,199.68

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Solution

The fourth proportional to 20,290.20, 30,438.14 and 9,199.68 is: 13,800.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,290.20 : 30,438.14 = 9,199.68 : x
  2. Step 2: Convert to fraction form
    20,290.20/30,438.14 = 9,199.68/x
  3. Step 3: Cross multiply
    20,290.20x = 30,438.14 × 9,199.68
  4. Step 4: Simplify right side
    20,290.20x = 280,021,147.80
  5. Step 5: Solve for x
    x = 280,021,147.80/20,290.20
  6. Step 6: Final answer
    x = 13,800.81

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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.