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Finding the Fourth Proportional to 20,119.87, 27,765.03 and 11,167.48

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Solution

The fourth proportional to 20,119.87, 27,765.03 and 11,167.48 is: 15,410.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,119.87 : 27,765.03 = 11,167.48 : x
  2. Step 2: Convert to fraction form
    20,119.87/27,765.03 = 11,167.48/x
  3. Step 3: Cross multiply
    20,119.87x = 27,765.03 × 11,167.48
  4. Step 4: Simplify right side
    20,119.87x = 310,065,417.22
  5. Step 5: Solve for x
    x = 310,065,417.22/20,119.87
  6. Step 6: Final answer
    x = 15,410.91

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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.