Home / 13,278.38-19,917.59-5,487.39

Finding the Fourth Proportional to 13,278.38, 19,917.59 and 5,487.39

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Solution

The fourth proportional to 13,278.38, 19,917.59 and 5,487.39 is: 8,231.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.38 : 19,917.59 = 5,487.39 : x
  2. Step 2: Convert to fraction form
    13,278.38/19,917.59 = 5,487.39/x
  3. Step 3: Cross multiply
    13,278.38x = 19,917.59 × 5,487.39
  4. Step 4: Simplify right side
    13,278.38x = 109,295,556.75
  5. Step 5: Solve for x
    x = 109,295,556.75/13,278.38
  6. Step 6: Final answer
    x = 8,231.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.