Home / 20,112.11-27,754.71-11,161.05

Finding the Fourth Proportional to 20,112.11, 27,754.71 and 11,161.05

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Solution

The fourth proportional to 20,112.11, 27,754.71 and 11,161.05 is: 15,402.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,112.11 : 27,754.71 = 11,161.05 : x
  2. Step 2: Convert to fraction form
    20,112.11/27,754.71 = 11,161.05/x
  3. Step 3: Cross multiply
    20,112.11x = 27,754.71 × 11,161.05
  4. Step 4: Simplify right side
    20,112.11x = 309,771,602.32
  5. Step 5: Solve for x
    x = 309,771,602.32/20,112.11
  6. Step 6: Final answer
    x = 15,402.25

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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.