Home / 10,815.05-16,222.68-3,419.55

Finding the Fourth Proportional to 10,815.05, 16,222.68 and 3,419.55

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Solution

The fourth proportional to 10,815.05, 16,222.68 and 3,419.55 is: 5,129.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,815.05 : 16,222.68 = 3,419.55 : x
  2. Step 2: Convert to fraction form
    10,815.05/16,222.68 = 3,419.55/x
  3. Step 3: Cross multiply
    10,815.05x = 16,222.68 × 3,419.55
  4. Step 4: Simplify right side
    10,815.05x = 55,474,265.39
  5. Step 5: Solve for x
    x = 55,474,265.39/10,815.05
  6. Step 6: Final answer
    x = 5,129.36

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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.