Home / 28,198.78-42,298.12-11,558.82

Finding the Fourth Proportional to 28,198.78, 42,298.12 and 11,558.82

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Solution

The fourth proportional to 28,198.78, 42,298.12 and 11,558.82 is: 17,338.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,198.78 : 42,298.12 = 11,558.82 : x
  2. Step 2: Convert to fraction form
    28,198.78/42,298.12 = 11,558.82/x
  3. Step 3: Cross multiply
    28,198.78x = 42,298.12 × 11,558.82
  4. Step 4: Simplify right side
    28,198.78x = 488,916,355.42
  5. Step 5: Solve for x
    x = 488,916,355.42/28,198.78
  6. Step 6: Final answer
    x = 17,338.21

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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.