Home / 20,809.38-28,714.96-11,856.66

Finding the Fourth Proportional to 20,809.38, 28,714.96 and 11,856.66

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Solution

The fourth proportional to 20,809.38, 28,714.96 and 11,856.66 is: 16,361.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.38 : 28,714.96 = 11,856.66 : x
  2. Step 2: Convert to fraction form
    20,809.38/28,714.96 = 11,856.66/x
  3. Step 3: Cross multiply
    20,809.38x = 28,714.96 × 11,856.66
  4. Step 4: Simplify right side
    20,809.38x = 340,463,517.63
  5. Step 5: Solve for x
    x = 340,463,517.63/20,809.38
  6. Step 6: Final answer
    x = 16,361.06

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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.