Home / 28,115.06-42,171.78-7,338.56

Finding the Fourth Proportional to 28,115.06, 42,171.78 and 7,338.56

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Solution

The fourth proportional to 28,115.06, 42,171.78 and 7,338.56 is: 11,007.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.06 : 42,171.78 = 7,338.56 : x
  2. Step 2: Convert to fraction form
    28,115.06/42,171.78 = 7,338.56/x
  3. Step 3: Cross multiply
    28,115.06x = 42,171.78 × 7,338.56
  4. Step 4: Simplify right side
    28,115.06x = 309,480,137.84
  5. Step 5: Solve for x
    x = 309,480,137.84/28,115.06
  6. Step 6: Final answer
    x = 11,007.63

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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.