Home / 3,989.09-5,969.05-3,340.28

Finding the Fourth Proportional to 3,989.09, 5,969.05 and 3,340.28

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Solution

The fourth proportional to 3,989.09, 5,969.05 and 3,340.28 is: 4,998.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.09 : 5,969.05 = 3,340.28 : x
  2. Step 2: Convert to fraction form
    3,989.09/5,969.05 = 3,340.28/x
  3. Step 3: Cross multiply
    3,989.09x = 5,969.05 × 3,340.28
  4. Step 4: Simplify right side
    3,989.09x = 19,938,298.33
  5. Step 5: Solve for x
    x = 19,938,298.33/3,989.09
  6. Step 6: Final answer
    x = 4,998.21

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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.