Home / 20,109.53-27,751.61-11,156.90

Finding the Fourth Proportional to 20,109.53, 27,751.61 and 11,156.90

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Solution

The fourth proportional to 20,109.53, 27,751.61 and 11,156.90 is: 15,396.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.53 : 27,751.61 = 11,156.90 : x
  2. Step 2: Convert to fraction form
    20,109.53/27,751.61 = 11,156.90/x
  3. Step 3: Cross multiply
    20,109.53x = 27,751.61 × 11,156.90
  4. Step 4: Simplify right side
    20,109.53x = 309,621,951.20
  5. Step 5: Solve for x
    x = 309,621,951.20/20,109.53
  6. Step 6: Final answer
    x = 15,396.78

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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.