Home / 20,122.90-27,771.24-11,172.22

Finding the Fourth Proportional to 20,122.90, 27,771.24 and 11,172.22

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Solution

The fourth proportional to 20,122.90, 27,771.24 and 11,172.22 is: 15,418.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,122.90 : 27,771.24 = 11,172.22 : x
  2. Step 2: Convert to fraction form
    20,122.90/27,771.24 = 11,172.22/x
  3. Step 3: Cross multiply
    20,122.90x = 27,771.24 × 11,172.22
  4. Step 4: Simplify right side
    20,122.90x = 310,266,402.95
  5. Step 5: Solve for x
    x = 310,266,402.95/20,122.90
  6. Step 6: Final answer
    x = 15,418.57

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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.