Home / 20,120.21-27,765.61-11,167.68

Finding the Fourth Proportional to 20,120.21, 27,765.61 and 11,167.68

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Solution

The fourth proportional to 20,120.21, 27,765.61 and 11,167.68 is: 15,411.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.21 : 27,765.61 = 11,167.68 : x
  2. Step 2: Convert to fraction form
    20,120.21/27,765.61 = 11,167.68/x
  3. Step 3: Cross multiply
    20,120.21x = 27,765.61 × 11,167.68
  4. Step 4: Simplify right side
    20,120.21x = 310,077,447.48
  5. Step 5: Solve for x
    x = 310,077,447.48/20,120.21
  6. Step 6: Final answer
    x = 15,411.24

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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.