Home / 20,120.64-27,765.18-11,168.15

Finding the Fourth Proportional to 20,120.64, 27,765.18 and 11,168.15

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Solution

The fourth proportional to 20,120.64, 27,765.18 and 11,168.15 is: 15,411.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.64 : 27,765.18 = 11,168.15 : x
  2. Step 2: Convert to fraction form
    20,120.64/27,765.18 = 11,168.15/x
  3. Step 3: Cross multiply
    20,120.64x = 27,765.18 × 11,168.15
  4. Step 4: Simplify right side
    20,120.64x = 310,085,556.19
  5. Step 5: Solve for x
    x = 310,085,556.19/20,120.64
  6. Step 6: Final answer
    x = 15,411.32

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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.