Home / 20,340.96-28,067.28-11,388.84

Finding the Fourth Proportional to 20,340.96, 28,067.28 and 11,388.84

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Solution

The fourth proportional to 20,340.96, 28,067.28 and 11,388.84 is: 15,714.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,340.96 : 28,067.28 = 11,388.84 : x
  2. Step 2: Convert to fraction form
    20,340.96/28,067.28 = 11,388.84/x
  3. Step 3: Cross multiply
    20,340.96x = 28,067.28 × 11,388.84
  4. Step 4: Simplify right side
    20,340.96x = 319,653,761.16
  5. Step 5: Solve for x
    x = 319,653,761.16/20,340.96
  6. Step 6: Final answer
    x = 15,714.78

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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.