Home / 20,143.80-27,799.68-11,191.36

Finding the Fourth Proportional to 20,143.80, 27,799.68 and 11,191.36

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Solution

The fourth proportional to 20,143.80, 27,799.68 and 11,191.36 is: 15,444.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.80 : 27,799.68 = 11,191.36 : x
  2. Step 2: Convert to fraction form
    20,143.80/27,799.68 = 11,191.36/x
  3. Step 3: Cross multiply
    20,143.80x = 27,799.68 × 11,191.36
  4. Step 4: Simplify right side
    20,143.80x = 311,116,226.76
  5. Step 5: Solve for x
    x = 311,116,226.76/20,143.80
  6. Step 6: Final answer
    x = 15,444.76

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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.