Home / 20,120.52-27,765.97-11,168.40

Finding the Fourth Proportional to 20,120.52, 27,765.97 and 11,168.40

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Solution

The fourth proportional to 20,120.52, 27,765.97 and 11,168.40 is: 15,412.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.52 : 27,765.97 = 11,168.40 : x
  2. Step 2: Convert to fraction form
    20,120.52/27,765.97 = 11,168.40/x
  3. Step 3: Cross multiply
    20,120.52x = 27,765.97 × 11,168.40
  4. Step 4: Simplify right side
    20,120.52x = 310,101,459.35
  5. Step 5: Solve for x
    x = 310,101,459.35/20,120.52
  6. Step 6: Final answer
    x = 15,412.20

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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.