Home / 11,222.85-16,815.12-7,929.60

Finding the Fourth Proportional to 11,222.85, 16,815.12 and 7,929.60

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Solution

The fourth proportional to 11,222.85, 16,815.12 and 7,929.60 is: 11,880.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,222.85 : 16,815.12 = 7,929.60 : x
  2. Step 2: Convert to fraction form
    11,222.85/16,815.12 = 7,929.60/x
  3. Step 3: Cross multiply
    11,222.85x = 16,815.12 × 7,929.60
  4. Step 4: Simplify right side
    11,222.85x = 133,337,175.55
  5. Step 5: Solve for x
    x = 133,337,175.55/11,222.85
  6. Step 6: Final answer
    x = 11,880.87

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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.