Home / 20,107.64-27,748.78-11,155.38

Finding the Fourth Proportional to 20,107.64, 27,748.78 and 11,155.38

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Solution

The fourth proportional to 20,107.64, 27,748.78 and 11,155.38 is: 15,394.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.64 : 27,748.78 = 11,155.38 : x
  2. Step 2: Convert to fraction form
    20,107.64/27,748.78 = 11,155.38/x
  3. Step 3: Cross multiply
    20,107.64x = 27,748.78 × 11,155.38
  4. Step 4: Simplify right side
    20,107.64x = 309,548,185.44
  5. Step 5: Solve for x
    x = 309,548,185.44/20,107.64
  6. Step 6: Final answer
    x = 15,394.56

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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.