Home / 20,161.49-27,821.28-11,208.45

Finding the Fourth Proportional to 20,161.49, 27,821.28 and 11,208.45

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Solution

The fourth proportional to 20,161.49, 27,821.28 and 11,208.45 is: 15,466.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,161.49 : 27,821.28 = 11,208.45 : x
  2. Step 2: Convert to fraction form
    20,161.49/27,821.28 = 11,208.45/x
  3. Step 3: Cross multiply
    20,161.49x = 27,821.28 × 11,208.45
  4. Step 4: Simplify right side
    20,161.49x = 311,833,425.82
  5. Step 5: Solve for x
    x = 311,833,425.82/20,161.49
  6. Step 6: Final answer
    x = 15,466.78

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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.