Home / 20,127.70-27,777.09-11,175.20

Finding the Fourth Proportional to 20,127.70, 27,777.09 and 11,175.20

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Solution

The fourth proportional to 20,127.70, 27,777.09 and 11,175.20 is: 15,422.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,127.70 : 27,777.09 = 11,175.20 : x
  2. Step 2: Convert to fraction form
    20,127.70/27,777.09 = 11,175.20/x
  3. Step 3: Cross multiply
    20,127.70x = 27,777.09 × 11,175.20
  4. Step 4: Simplify right side
    20,127.70x = 310,414,536.17
  5. Step 5: Solve for x
    x = 310,414,536.17/20,127.70
  6. Step 6: Final answer
    x = 15,422.26

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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.