Home / 20,112.36-27,754.64-11,159.79

Finding the Fourth Proportional to 20,112.36, 27,754.64 and 11,159.79

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Solution

The fourth proportional to 20,112.36, 27,754.64 and 11,159.79 is: 15,400.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,112.36 : 27,754.64 = 11,159.79 : x
  2. Step 2: Convert to fraction form
    20,112.36/27,754.64 = 11,159.79/x
  3. Step 3: Cross multiply
    20,112.36x = 27,754.64 × 11,159.79
  4. Step 4: Simplify right side
    20,112.36x = 309,735,953.93
  5. Step 5: Solve for x
    x = 309,735,953.93/20,112.36
  6. Step 6: Final answer
    x = 15,400.28

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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.