Home / 5,179.19-7,147.28-2,821.33

Finding the Fourth Proportional to 5,179.19, 7,147.28 and 2,821.33

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Solution

The fourth proportional to 5,179.19, 7,147.28 and 2,821.33 is: 3,893.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.19 : 7,147.28 = 2,821.33 : x
  2. Step 2: Convert to fraction form
    5,179.19/7,147.28 = 2,821.33/x
  3. Step 3: Cross multiply
    5,179.19x = 7,147.28 × 2,821.33
  4. Step 4: Simplify right side
    5,179.19x = 20,164,803.51
  5. Step 5: Solve for x
    x = 20,164,803.51/5,179.19
  6. Step 6: Final answer
    x = 3,893.43

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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.