Home / 12,431.20-18,646.78-3,672.27

Finding the Fourth Proportional to 12,431.20, 18,646.78 and 3,672.27

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Solution

The fourth proportional to 12,431.20, 18,646.78 and 3,672.27 is: 5,508.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.20 : 18,646.78 = 3,672.27 : x
  2. Step 2: Convert to fraction form
    12,431.20/18,646.78 = 3,672.27/x
  3. Step 3: Cross multiply
    12,431.20x = 18,646.78 × 3,672.27
  4. Step 4: Simplify right side
    12,431.20x = 68,475,899.20
  5. Step 5: Solve for x
    x = 68,475,899.20/12,431.20
  6. Step 6: Final answer
    x = 5,508.39

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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.