Home / 28,621.38-42,924.32-11,978

Finding the Fourth Proportional to 28,621.38, 42,924.32 and 11,978

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Solution

The fourth proportional to 28,621.38, 42,924.32 and 11,978 is: 17,963.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,621.38 : 42,924.32 = 11,978 : x
  2. Step 2: Convert to fraction form
    28,621.38/42,924.32 = 11,978/x
  3. Step 3: Cross multiply
    28,621.38x = 42,924.32 × 11,978
  4. Step 4: Simplify right side
    28,621.38x = 514,147,504.96
  5. Step 5: Solve for x
    x = 514,147,504.96/28,621.38
  6. Step 6: Final answer
    x = 17,963.76

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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.