Home / 20,155.58-27,815.62-11,203.96

Finding the Fourth Proportional to 20,155.58, 27,815.62 and 11,203.96

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Solution

The fourth proportional to 20,155.58, 27,815.62 and 11,203.96 is: 15,461.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.58 : 27,815.62 = 11,203.96 : x
  2. Step 2: Convert to fraction form
    20,155.58/27,815.62 = 11,203.96/x
  3. Step 3: Cross multiply
    20,155.58x = 27,815.62 × 11,203.96
  4. Step 4: Simplify right side
    20,155.58x = 311,645,093.86
  5. Step 5: Solve for x
    x = 311,645,093.86/20,155.58
  6. Step 6: Final answer
    x = 15,461.98

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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.