Home / 28,115.92-38,768.32-19,168.64

Finding the Fourth Proportional to 28,115.92, 38,768.32 and 19,168.64

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Solution

The fourth proportional to 28,115.92, 38,768.32 and 19,168.64 is: 26,431.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.92 : 38,768.32 = 19,168.64 : x
  2. Step 2: Convert to fraction form
    28,115.92/38,768.32 = 19,168.64/x
  3. Step 3: Cross multiply
    28,115.92x = 38,768.32 × 19,168.64
  4. Step 4: Simplify right side
    28,115.92x = 743,135,969.48
  5. Step 5: Solve for x
    x = 743,135,969.48/28,115.92
  6. Step 6: Final answer
    x = 26,431.15

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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.