Home / 8,420.62-11,620.26-5,278.54

Finding the Fourth Proportional to 8,420.62, 11,620.26 and 5,278.54

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Solution

The fourth proportional to 8,420.62, 11,620.26 and 5,278.54 is: 7,284.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.62 : 11,620.26 = 5,278.54 : x
  2. Step 2: Convert to fraction form
    8,420.62/11,620.26 = 5,278.54/x
  3. Step 3: Cross multiply
    8,420.62x = 11,620.26 × 5,278.54
  4. Step 4: Simplify right side
    8,420.62x = 61,338,007.22
  5. Step 5: Solve for x
    x = 61,338,007.22/8,420.62
  6. Step 6: Final answer
    x = 7,284.26

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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.