Home / 12,082.36-18,120.26-3,315.20

Finding the Fourth Proportional to 12,082.36, 18,120.26 and 3,315.20

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Solution

The fourth proportional to 12,082.36, 18,120.26 and 3,315.20 is: 4,971.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,082.36 : 18,120.26 = 3,315.20 : x
  2. Step 2: Convert to fraction form
    12,082.36/18,120.26 = 3,315.20/x
  3. Step 3: Cross multiply
    12,082.36x = 18,120.26 × 3,315.20
  4. Step 4: Simplify right side
    12,082.36x = 60,072,285.95
  5. Step 5: Solve for x
    x = 60,072,285.95/12,082.36
  6. Step 6: Final answer
    x = 4,971.90

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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.