Home / 5,290.80-7,939.44-2,172.30

Finding the Fourth Proportional to 5,290.80, 7,939.44 and 2,172.30

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Solution

The fourth proportional to 5,290.80, 7,939.44 and 2,172.30 is: 3,259.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,290.80 : 7,939.44 = 2,172.30 : x
  2. Step 2: Convert to fraction form
    5,290.80/7,939.44 = 2,172.30/x
  3. Step 3: Cross multiply
    5,290.80x = 7,939.44 × 2,172.30
  4. Step 4: Simplify right side
    5,290.80x = 17,246,845.51
  5. Step 5: Solve for x
    x = 17,246,845.51/5,290.80
  6. Step 6: Final answer
    x = 3,259.78

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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.