Home / 20,143.70-27,775.89-13,771.33

Finding the Fourth Proportional to 20,143.70, 27,775.89 and 13,771.33

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Solution

The fourth proportional to 20,143.70, 27,775.89 and 13,771.33 is: 18,989.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.70 : 27,775.89 = 13,771.33 : x
  2. Step 2: Convert to fraction form
    20,143.70/27,775.89 = 13,771.33/x
  3. Step 3: Cross multiply
    20,143.70x = 27,775.89 × 13,771.33
  4. Step 4: Simplify right side
    20,143.70x = 382,510,877.79
  5. Step 5: Solve for x
    x = 382,510,877.79/20,143.70
  6. Step 6: Final answer
    x = 18,989.11

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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.