Home / 20,908.82-28,891.56-15,552.86

Finding the Fourth Proportional to 20,908.82, 28,891.56 and 15,552.86

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Solution

The fourth proportional to 20,908.82, 28,891.56 and 15,552.86 is: 21,490.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.82 : 28,891.56 = 15,552.86 : x
  2. Step 2: Convert to fraction form
    20,908.82/28,891.56 = 15,552.86/x
  3. Step 3: Cross multiply
    20,908.82x = 28,891.56 × 15,552.86
  4. Step 4: Simplify right side
    20,908.82x = 449,346,387.86
  5. Step 5: Solve for x
    x = 449,346,387.86/20,908.82
  6. Step 6: Final answer
    x = 21,490.76

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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.