Home / 28,115.05-42,172.58-7,338.55

Finding the Fourth Proportional to 28,115.05, 42,172.58 and 7,338.55

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Solution

The fourth proportional to 28,115.05, 42,172.58 and 7,338.55 is: 11,007.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.05 : 42,172.58 = 7,338.55 : x
  2. Step 2: Convert to fraction form
    28,115.05/42,172.58 = 7,338.55/x
  3. Step 3: Cross multiply
    28,115.05x = 42,172.58 × 7,338.55
  4. Step 4: Simplify right side
    28,115.05x = 309,485,586.96
  5. Step 5: Solve for x
    x = 309,485,586.96/28,115.05
  6. Step 6: Final answer
    x = 11,007.83

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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.