Home / 20,403.38-28,149.57-12,850.34

Finding the Fourth Proportional to 20,403.38, 28,149.57 and 12,850.34

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Solution

The fourth proportional to 20,403.38, 28,149.57 and 12,850.34 is: 17,729.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.38 : 28,149.57 = 12,850.34 : x
  2. Step 2: Convert to fraction form
    20,403.38/28,149.57 = 12,850.34/x
  3. Step 3: Cross multiply
    20,403.38x = 28,149.57 × 12,850.34
  4. Step 4: Simplify right side
    20,403.38x = 361,731,404.61
  5. Step 5: Solve for x
    x = 361,731,404.61/20,403.38
  6. Step 6: Final answer
    x = 17,729.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.