Home / 18,439.78-27,661.26-7,910.28

Finding the Fourth Proportional to 18,439.78, 27,661.26 and 7,910.28

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Solution

The fourth proportional to 18,439.78, 27,661.26 and 7,910.28 is: 11,866.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,439.78 : 27,661.26 = 7,910.28 : x
  2. Step 2: Convert to fraction form
    18,439.78/27,661.26 = 7,910.28/x
  3. Step 3: Cross multiply
    18,439.78x = 27,661.26 × 7,910.28
  4. Step 4: Simplify right side
    18,439.78x = 218,808,311.75
  5. Step 5: Solve for x
    x = 218,808,311.75/18,439.78
  6. Step 6: Final answer
    x = 11,866.10

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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.