Home / 20,143.93-27,799.10-11,191.81

Finding the Fourth Proportional to 20,143.93, 27,799.10 and 11,191.81

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Solution

The fourth proportional to 20,143.93, 27,799.10 and 11,191.81 is: 15,444.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.93 : 27,799.10 = 11,191.81 : x
  2. Step 2: Convert to fraction form
    20,143.93/27,799.10 = 11,191.81/x
  3. Step 3: Cross multiply
    20,143.93x = 27,799.10 × 11,191.81
  4. Step 4: Simplify right side
    20,143.93x = 311,122,245.37
  5. Step 5: Solve for x
    x = 311,122,245.37/20,143.93
  6. Step 6: Final answer
    x = 15,444.96

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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.