Home / 7,280.20-10,920.38-3,991.51

Finding the Fourth Proportional to 7,280.20, 10,920.38 and 3,991.51

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Solution

The fourth proportional to 7,280.20, 10,920.38 and 3,991.51 is: 5,987.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,280.20 : 10,920.38 = 3,991.51 : x
  2. Step 2: Convert to fraction form
    7,280.20/10,920.38 = 3,991.51/x
  3. Step 3: Cross multiply
    7,280.20x = 10,920.38 × 3,991.51
  4. Step 4: Simplify right side
    7,280.20x = 43,588,805.97
  5. Step 5: Solve for x
    x = 43,588,805.97/7,280.20
  6. Step 6: Final answer
    x = 5,987.31

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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.