Home / 11,865.20-17,797.78-11,143.50

Finding the Fourth Proportional to 11,865.20, 17,797.78 and 11,143.50

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Solution

The fourth proportional to 11,865.20, 17,797.78 and 11,143.50 is: 16,715.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,865.20 : 17,797.78 = 11,143.50 : x
  2. Step 2: Convert to fraction form
    11,865.20/17,797.78 = 11,143.50/x
  3. Step 3: Cross multiply
    11,865.20x = 17,797.78 × 11,143.50
  4. Step 4: Simplify right side
    11,865.20x = 198,329,561.43
  5. Step 5: Solve for x
    x = 198,329,561.43/11,865.20
  6. Step 6: Final answer
    x = 16,715.23

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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.