Home / 20,145.88-30,228.42-12,350.20

Finding the Fourth Proportional to 20,145.88, 30,228.42 and 12,350.20

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Solution

The fourth proportional to 20,145.88, 30,228.42 and 12,350.20 is: 18,531.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.88 : 30,228.42 = 12,350.20 : x
  2. Step 2: Convert to fraction form
    20,145.88/30,228.42 = 12,350.20/x
  3. Step 3: Cross multiply
    20,145.88x = 30,228.42 × 12,350.20
  4. Step 4: Simplify right side
    20,145.88x = 373,327,032.68
  5. Step 5: Solve for x
    x = 373,327,032.68/20,145.88
  6. Step 6: Final answer
    x = 18,531.19

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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.