Home / 20,120.31-27,769.35-11,170.68

Finding the Fourth Proportional to 20,120.31, 27,769.35 and 11,170.68

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Solution

The fourth proportional to 20,120.31, 27,769.35 and 11,170.68 is: 15,417.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.31 : 27,769.35 = 11,170.68 : x
  2. Step 2: Convert to fraction form
    20,120.31/27,769.35 = 11,170.68/x
  3. Step 3: Cross multiply
    20,120.31x = 27,769.35 × 11,170.68
  4. Step 4: Simplify right side
    20,120.31x = 310,202,522.66
  5. Step 5: Solve for x
    x = 310,202,522.66/20,120.31
  6. Step 6: Final answer
    x = 15,417.38

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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.