Home / 12,120.96-18,166.32-4,321.20

Finding the Fourth Proportional to 12,120.96, 18,166.32 and 4,321.20

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Solution

The fourth proportional to 12,120.96, 18,166.32 and 4,321.20 is: 6,476.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.96 : 18,166.32 = 4,321.20 : x
  2. Step 2: Convert to fraction form
    12,120.96/18,166.32 = 4,321.20/x
  3. Step 3: Cross multiply
    12,120.96x = 18,166.32 × 4,321.20
  4. Step 4: Simplify right side
    12,120.96x = 78,500,301.98
  5. Step 5: Solve for x
    x = 78,500,301.98/12,120.96
  6. Step 6: Final answer
    x = 6,476.41

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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.