Home / 3,970.80-5,467.20-3,372.11

Finding the Fourth Proportional to 3,970.80, 5,467.20 and 3,372.11

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Solution

The fourth proportional to 3,970.80, 5,467.20 and 3,372.11 is: 4,642.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.80 : 5,467.20 = 3,372.11 : x
  2. Step 2: Convert to fraction form
    3,970.80/5,467.20 = 3,372.11/x
  3. Step 3: Cross multiply
    3,970.80x = 5,467.20 × 3,372.11
  4. Step 4: Simplify right side
    3,970.80x = 18,435,999.79
  5. Step 5: Solve for x
    x = 18,435,999.79/3,970.80
  6. Step 6: Final answer
    x = 4,642.89

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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.