Home / 20,489.34-28,249.92-13,403.46

Finding the Fourth Proportional to 20,489.34, 28,249.92 and 13,403.46

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Solution

The fourth proportional to 20,489.34, 28,249.92 and 13,403.46 is: 18,480.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.34 : 28,249.92 = 13,403.46 : x
  2. Step 2: Convert to fraction form
    20,489.34/28,249.92 = 13,403.46/x
  3. Step 3: Cross multiply
    20,489.34x = 28,249.92 × 13,403.46
  4. Step 4: Simplify right side
    20,489.34x = 378,646,672.72
  5. Step 5: Solve for x
    x = 378,646,672.72/20,489.34
  6. Step 6: Final answer
    x = 18,480.18

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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.