Home / 20,155.91-27,815.18-11,203.20

Finding the Fourth Proportional to 20,155.91, 27,815.18 and 11,203.20

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Solution

The fourth proportional to 20,155.91, 27,815.18 and 11,203.20 is: 15,460.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.91 : 27,815.18 = 11,203.20 : x
  2. Step 2: Convert to fraction form
    20,155.91/27,815.18 = 11,203.20/x
  3. Step 3: Cross multiply
    20,155.91x = 27,815.18 × 11,203.20
  4. Step 4: Simplify right side
    20,155.91x = 311,618,968.56
  5. Step 5: Solve for x
    x = 311,618,968.56/20,155.91
  6. Step 6: Final answer
    x = 15,460.43

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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.