Home / 20,112.40-27,756.84-11,728.72

Finding the Fourth Proportional to 20,112.40, 27,756.84 and 11,728.72

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Solution

The fourth proportional to 20,112.40, 27,756.84 and 11,728.72 is: 16,186.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,112.40 : 27,756.84 = 11,728.72 : x
  2. Step 2: Convert to fraction form
    20,112.40/27,756.84 = 11,728.72/x
  3. Step 3: Cross multiply
    20,112.40x = 27,756.84 × 11,728.72
  4. Step 4: Simplify right side
    20,112.40x = 325,552,204.44
  5. Step 5: Solve for x
    x = 325,552,204.44/20,112.40
  6. Step 6: Final answer
    x = 16,186.64

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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.