Home / 12,428.28-18,636.84-3,660.12

Finding the Fourth Proportional to 12,428.28, 18,636.84 and 3,660.12

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Solution

The fourth proportional to 12,428.28, 18,636.84 and 3,660.12 is: 5,488.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.28 : 18,636.84 = 3,660.12 : x
  2. Step 2: Convert to fraction form
    12,428.28/18,636.84 = 3,660.12/x
  3. Step 3: Cross multiply
    12,428.28x = 18,636.84 × 3,660.12
  4. Step 4: Simplify right side
    12,428.28x = 68,213,070.82
  5. Step 5: Solve for x
    x = 68,213,070.82/12,428.28
  6. Step 6: Final answer
    x = 5,488.54

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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.