Home / 11,121.12-16,689.90-5,277.78

Finding the Fourth Proportional to 11,121.12, 16,689.90 and 5,277.78

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Solution

The fourth proportional to 11,121.12, 16,689.90 and 5,277.78 is: 7,920.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.12 : 16,689.90 = 5,277.78 : x
  2. Step 2: Convert to fraction form
    11,121.12/16,689.90 = 5,277.78/x
  3. Step 3: Cross multiply
    11,121.12x = 16,689.90 × 5,277.78
  4. Step 4: Simplify right side
    11,121.12x = 88,085,620.42
  5. Step 5: Solve for x
    x = 88,085,620.42/11,121.12
  6. Step 6: Final answer
    x = 7,920.57

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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.