Home / 12,939.84-17,850.24-9,790.56

Finding the Fourth Proportional to 12,939.84, 17,850.24 and 9,790.56

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Solution

The fourth proportional to 12,939.84, 17,850.24 and 9,790.56 is: 13,505.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.84 : 17,850.24 = 9,790.56 : x
  2. Step 2: Convert to fraction form
    12,939.84/17,850.24 = 9,790.56/x
  3. Step 3: Cross multiply
    12,939.84x = 17,850.24 × 9,790.56
  4. Step 4: Simplify right side
    12,939.84x = 174,763,845.73
  5. Step 5: Solve for x
    x = 174,763,845.73/12,939.84
  6. Step 6: Final answer
    x = 13,505.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.