Home / 12,454.30-18,685.05-3,689.38

Finding the Fourth Proportional to 12,454.30, 18,685.05 and 3,689.38

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Solution

The fourth proportional to 12,454.30, 18,685.05 and 3,689.38 is: 5,535.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,454.30 : 18,685.05 = 3,689.38 : x
  2. Step 2: Convert to fraction form
    12,454.30/18,685.05 = 3,689.38/x
  3. Step 3: Cross multiply
    12,454.30x = 18,685.05 × 3,689.38
  4. Step 4: Simplify right side
    12,454.30x = 68,936,249.77
  5. Step 5: Solve for x
    x = 68,936,249.77/12,454.30
  6. Step 6: Final answer
    x = 5,535.14

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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.