Home / 20,156.42-27,815.38-11,203.84

Finding the Fourth Proportional to 20,156.42, 27,815.38 and 11,203.84

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Solution

The fourth proportional to 20,156.42, 27,815.38 and 11,203.84 is: 15,461.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.42 : 27,815.38 = 11,203.84 : x
  2. Step 2: Convert to fraction form
    20,156.42/27,815.38 = 11,203.84/x
  3. Step 3: Cross multiply
    20,156.42x = 27,815.38 × 11,203.84
  4. Step 4: Simplify right side
    20,156.42x = 311,639,067.06
  5. Step 5: Solve for x
    x = 311,639,067.06/20,156.42
  6. Step 6: Final answer
    x = 15,461.03

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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.