Home / 12,456.28-18,684.38-3,690.49

Finding the Fourth Proportional to 12,456.28, 18,684.38 and 3,690.49

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Solution

The fourth proportional to 12,456.28, 18,684.38 and 3,690.49 is: 5,535.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,456.28 : 18,684.38 = 3,690.49 : x
  2. Step 2: Convert to fraction form
    12,456.28/18,684.38 = 3,690.49/x
  3. Step 3: Cross multiply
    12,456.28x = 18,684.38 × 3,690.49
  4. Step 4: Simplify right side
    12,456.28x = 68,954,405.67
  5. Step 5: Solve for x
    x = 68,954,405.67/12,456.28
  6. Step 6: Final answer
    x = 5,535.71

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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.