Home / 12,215.40-18,321.30-3,451.20

Finding the Fourth Proportional to 12,215.40, 18,321.30 and 3,451.20

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Solution

The fourth proportional to 12,215.40, 18,321.30 and 3,451.20 is: 5,176.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215.40 : 18,321.30 = 3,451.20 : x
  2. Step 2: Convert to fraction form
    12,215.40/18,321.30 = 3,451.20/x
  3. Step 3: Cross multiply
    12,215.40x = 18,321.30 × 3,451.20
  4. Step 4: Simplify right side
    12,215.40x = 63,230,470.56
  5. Step 5: Solve for x
    x = 63,230,470.56/12,215.40
  6. Step 6: Final answer
    x = 5,176.29

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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.