Home / 8,122.75-11,209.67-4,978.33

Finding the Fourth Proportional to 8,122.75, 11,209.67 and 4,978.33

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Solution

The fourth proportional to 8,122.75, 11,209.67 and 4,978.33 is: 6,870.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,122.75 : 11,209.67 = 4,978.33 : x
  2. Step 2: Convert to fraction form
    8,122.75/11,209.67 = 4,978.33/x
  3. Step 3: Cross multiply
    8,122.75x = 11,209.67 × 4,978.33
  4. Step 4: Simplify right side
    8,122.75x = 55,805,436.45
  5. Step 5: Solve for x
    x = 55,805,436.45/8,122.75
  6. Step 6: Final answer
    x = 6,870.26

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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.