Home / 20,109.42-27,751.07-11,157.10

Finding the Fourth Proportional to 20,109.42, 27,751.07 and 11,157.10

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Solution

The fourth proportional to 20,109.42, 27,751.07 and 11,157.10 is: 15,396.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.42 : 27,751.07 = 11,157.10 : x
  2. Step 2: Convert to fraction form
    20,109.42/27,751.07 = 11,157.10/x
  3. Step 3: Cross multiply
    20,109.42x = 27,751.07 × 11,157.10
  4. Step 4: Simplify right side
    20,109.42x = 309,621,463.10
  5. Step 5: Solve for x
    x = 309,621,463.10/20,109.42
  6. Step 6: Final answer
    x = 15,396.84

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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.