Home / 20,120.12-27,765.37-11,167.73

Finding the Fourth Proportional to 20,120.12, 27,765.37 and 11,167.73

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Solution

The fourth proportional to 20,120.12, 27,765.37 and 11,167.73 is: 15,411.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.12 : 27,765.37 = 11,167.73 : x
  2. Step 2: Convert to fraction form
    20,120.12/27,765.37 = 11,167.73/x
  3. Step 3: Cross multiply
    20,120.12x = 27,765.37 × 11,167.73
  4. Step 4: Simplify right side
    20,120.12x = 310,076,155.51
  5. Step 5: Solve for x
    x = 310,076,155.51/20,120.12
  6. Step 6: Final answer
    x = 15,411.25

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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.