Home / 12,621.88-18,932.82-3,388.12

Finding the Fourth Proportional to 12,621.88, 18,932.82 and 3,388.12

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Solution

The fourth proportional to 12,621.88, 18,932.82 and 3,388.12 is: 5,082.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,621.88 : 18,932.82 = 3,388.12 : x
  2. Step 2: Convert to fraction form
    12,621.88/18,932.82 = 3,388.12/x
  3. Step 3: Cross multiply
    12,621.88x = 18,932.82 × 3,388.12
  4. Step 4: Simplify right side
    12,621.88x = 64,146,666.10
  5. Step 5: Solve for x
    x = 64,146,666.10/12,621.88
  6. Step 6: Final answer
    x = 5,082.18

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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.