Home / 20,111.42-27,757.07-11,161.80

Finding the Fourth Proportional to 20,111.42, 27,757.07 and 11,161.80

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Solution

The fourth proportional to 20,111.42, 27,757.07 and 11,161.80 is: 15,405.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.42 : 27,757.07 = 11,161.80 : x
  2. Step 2: Convert to fraction form
    20,111.42/27,757.07 = 11,161.80/x
  3. Step 3: Cross multiply
    20,111.42x = 27,757.07 × 11,161.80
  4. Step 4: Simplify right side
    20,111.42x = 309,818,808.12
  5. Step 5: Solve for x
    x = 309,818,808.12/20,111.42
  6. Step 6: Final answer
    x = 15,405.12

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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.