Home / 12,439.49-17,183.30-9,939.14

Finding the Fourth Proportional to 12,439.49, 17,183.30 and 9,939.14

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Solution

The fourth proportional to 12,439.49, 17,183.30 and 9,939.14 is: 13,729.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439.49 : 17,183.30 = 9,939.14 : x
  2. Step 2: Convert to fraction form
    12,439.49/17,183.30 = 9,939.14/x
  3. Step 3: Cross multiply
    12,439.49x = 17,183.30 × 9,939.14
  4. Step 4: Simplify right side
    12,439.49x = 170,787,088.75
  5. Step 5: Solve for x
    x = 170,787,088.75/12,439.49
  6. Step 6: Final answer
    x = 13,729.43

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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.