Home / 20,102.95-27,742.08-11,150.56

Finding the Fourth Proportional to 20,102.95, 27,742.08 and 11,150.56

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Solution

The fourth proportional to 20,102.95, 27,742.08 and 11,150.56 is: 15,387.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.95 : 27,742.08 = 11,150.56 : x
  2. Step 2: Convert to fraction form
    20,102.95/27,742.08 = 11,150.56/x
  3. Step 3: Cross multiply
    20,102.95x = 27,742.08 × 11,150.56
  4. Step 4: Simplify right side
    20,102.95x = 309,339,727.56
  5. Step 5: Solve for x
    x = 309,339,727.56/20,102.95
  6. Step 6: Final answer
    x = 15,387.78

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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.