Home / 20,809.38-28,716.94-13,370.34

Finding the Fourth Proportional to 20,809.38, 28,716.94 and 13,370.34

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Solution

The fourth proportional to 20,809.38, 28,716.94 and 13,370.34 is: 18,451.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.38 : 28,716.94 = 13,370.34 : x
  2. Step 2: Convert to fraction form
    20,809.38/28,716.94 = 13,370.34/x
  3. Step 3: Cross multiply
    20,809.38x = 28,716.94 × 13,370.34
  4. Step 4: Simplify right side
    20,809.38x = 383,955,251.56
  5. Step 5: Solve for x
    x = 383,955,251.56/20,809.38
  6. Step 6: Final answer
    x = 18,451.07

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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.