Home / 3,930.48-5,420.70-2,809.32

Finding the Fourth Proportional to 3,930.48, 5,420.70 and 2,809.32

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Solution

The fourth proportional to 3,930.48, 5,420.70 and 2,809.32 is: 3,874.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.48 : 5,420.70 = 2,809.32 : x
  2. Step 2: Convert to fraction form
    3,930.48/5,420.70 = 2,809.32/x
  3. Step 3: Cross multiply
    3,930.48x = 5,420.70 × 2,809.32
  4. Step 4: Simplify right side
    3,930.48x = 15,228,480.92
  5. Step 5: Solve for x
    x = 15,228,480.92/3,930.48
  6. Step 6: Final answer
    x = 3,874.46

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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.