Home / 3,939.09-5,430.90-3,228.32

Finding the Fourth Proportional to 3,939.09, 5,430.90 and 3,228.32

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Solution

The fourth proportional to 3,939.09, 5,430.90 and 3,228.32 is: 4,450.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.09 : 5,430.90 = 3,228.32 : x
  2. Step 2: Convert to fraction form
    3,939.09/5,430.90 = 3,228.32/x
  3. Step 3: Cross multiply
    3,939.09x = 5,430.90 × 3,228.32
  4. Step 4: Simplify right side
    3,939.09x = 17,532,683.09
  5. Step 5: Solve for x
    x = 17,532,683.09/3,939.09
  6. Step 6: Final answer
    x = 4,450.95

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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.