Home / 12,249.40-18,376.80-3,929.80

Finding the Fourth Proportional to 12,249.40, 18,376.80 and 3,929.80

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Solution

The fourth proportional to 12,249.40, 18,376.80 and 3,929.80 is: 5,895.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,249.40 : 18,376.80 = 3,929.80 : x
  2. Step 2: Convert to fraction form
    12,249.40/18,376.80 = 3,929.80/x
  3. Step 3: Cross multiply
    12,249.40x = 18,376.80 × 3,929.80
  4. Step 4: Simplify right side
    12,249.40x = 72,217,148.64
  5. Step 5: Solve for x
    x = 72,217,148.64/12,249.40
  6. Step 6: Final answer
    x = 5,895.57

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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.