Home / 20,121.14-27,765.86-11,168.64

Finding the Fourth Proportional to 20,121.14, 27,765.86 and 11,168.64

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Solution

The fourth proportional to 20,121.14, 27,765.86 and 11,168.64 is: 15,412.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.14 : 27,765.86 = 11,168.64 : x
  2. Step 2: Convert to fraction form
    20,121.14/27,765.86 = 11,168.64/x
  3. Step 3: Cross multiply
    20,121.14x = 27,765.86 × 11,168.64
  4. Step 4: Simplify right side
    20,121.14x = 310,106,894.63
  5. Step 5: Solve for x
    x = 310,106,894.63/20,121.14
  6. Step 6: Final answer
    x = 15,412.00

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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.