Home / 20,218.78-27,900.70-11,720.22

Finding the Fourth Proportional to 20,218.78, 27,900.70 and 11,720.22

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Solution

The fourth proportional to 20,218.78, 27,900.70 and 11,720.22 is: 16,173.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218.78 : 27,900.70 = 11,720.22 : x
  2. Step 2: Convert to fraction form
    20,218.78/27,900.70 = 11,720.22/x
  3. Step 3: Cross multiply
    20,218.78x = 27,900.70 × 11,720.22
  4. Step 4: Simplify right side
    20,218.78x = 327,002,342.15
  5. Step 5: Solve for x
    x = 327,002,342.15/20,218.78
  6. Step 6: Final answer
    x = 16,173.20

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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.