Home / 20,145.78-27,799.88-11,193.66

Finding the Fourth Proportional to 20,145.78, 27,799.88 and 11,193.66

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Solution

The fourth proportional to 20,145.78, 27,799.88 and 11,193.66 is: 15,446.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.78 : 27,799.88 = 11,193.66 : x
  2. Step 2: Convert to fraction form
    20,145.78/27,799.88 = 11,193.66/x
  3. Step 3: Cross multiply
    20,145.78x = 27,799.88 × 11,193.66
  4. Step 4: Simplify right side
    20,145.78x = 311,182,348.79
  5. Step 5: Solve for x
    x = 311,182,348.79/20,145.78
  6. Step 6: Final answer
    x = 15,446.53

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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.