Home / 20,120.40-27,766.46-11,168.48

Finding the Fourth Proportional to 20,120.40, 27,766.46 and 11,168.48

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Solution

The fourth proportional to 20,120.40, 27,766.46 and 11,168.48 is: 15,412.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.40 : 27,766.46 = 11,168.48 : x
  2. Step 2: Convert to fraction form
    20,120.40/27,766.46 = 11,168.48/x
  3. Step 3: Cross multiply
    20,120.40x = 27,766.46 × 11,168.48
  4. Step 4: Simplify right side
    20,120.40x = 310,108,958.51
  5. Step 5: Solve for x
    x = 310,108,958.51/20,120.40
  6. Step 6: Final answer
    x = 15,412.66

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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.