Home / 13,383.36-19,933.56-12,680.64

Finding the Fourth Proportional to 13,383.36, 19,933.56 and 12,680.64

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Solution

The fourth proportional to 13,383.36, 19,933.56 and 12,680.64 is: 18,886.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,383.36 : 19,933.56 = 12,680.64 : x
  2. Step 2: Convert to fraction form
    13,383.36/19,933.56 = 12,680.64/x
  3. Step 3: Cross multiply
    13,383.36x = 19,933.56 × 12,680.64
  4. Step 4: Simplify right side
    13,383.36x = 252,770,298.28
  5. Step 5: Solve for x
    x = 252,770,298.28/13,383.36
  6. Step 6: Final answer
    x = 18,886.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.